389555920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{281}}^1$

素因数の和:381

約数の個数: 160

約数和(自身を含む): 1033933824

約数和(自身を除く): 644377904

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 43, 52, 62, 65, 80, 86, 104, 124, 130, 155, 172, 208, 215, 248, 260, 281, 310, 344, 403, 430, 496, 520, 559, 562, 620, 688, 806, 860, 1040, 1118, 1124, 1240, 1333, 1405, 1612, 1720, 2015, 2236, 2248, 2480, 2666, 2795, 2810, 3224, 3440, 3653, 4030, 4472, 4496, 5332, 5590, 5620, 6448, 6665, 7306, 8060, 8711, 8944, 10664, 11180, 11240, 12083, 13330, 14612, 16120, 17329, 17422, 18265, 21328, 22360, 22480, 24166, 26660, 29224, 32240, 34658, 34844, 36530, 43555, 44720, 48332, 53320, 58448, 60415, 69316, 69688, 73060, 86645, 87110, 96664, 106640, 113243, 120830, 138632, 139376, 146120, 157079, 173290, 174220, 193328, 226486, 241660, 277264, 292240, 314158, 346580, 348440, 374573, 452972, 483320, 566215, 628316, 693160, 696880, 749146, 785395, 905944, 966640, 1132430, 1256632, 1386320, 1498292, 1570790, 1811888, 1872865, 2264860, 2513264, 2996584, 3141580, 3745730, 4529720, 4869449, 5993168, 6283160, 7491460, 9059440, 9738898, 12566320, 14982920, 19477796, 24347245, 29965840, 38955592, 48694490, 77911184, 97388980, 194777960, 389555920]

約数ペア:

[(1, 389555920), (2, 194777960), (4, 97388980), (5, 77911184), (8, 48694490), (10, 38955592), (13, 29965840), (16, 24347245), (20, 19477796), (26, 14982920), (31, 12566320), (40, 9738898), (43, 9059440), (52, 7491460), (62, 6283160), (65, 5993168), (80, 4869449), (86, 4529720), (104, 3745730), (124, 3141580), (130, 2996584), (155, 2513264), (172, 2264860), (208, 1872865), (215, 1811888), (248, 1570790), (260, 1498292), (281, 1386320), (310, 1256632), (344, 1132430), (403, 966640), (430, 905944), (496, 785395), (520, 749146), (559, 696880), (562, 693160), (620, 628316), (688, 566215), (806, 483320), (860, 452972), (1040, 374573), (1118, 348440), (1124, 346580), (1240, 314158), (1333, 292240), (1405, 277264), (1612, 241660), (1720, 226486), (2015, 193328), (2236, 174220), (2248, 173290), (2480, 157079), (2666, 146120), (2795, 139376), (2810, 138632), (3224, 120830), (3440, 113243), (3653, 106640), (4030, 96664), (4472, 87110), (4496, 86645), (5332, 73060), (5590, 69688), (5620, 69316), (6448, 60415), (6665, 58448), (7306, 53320), (8060, 48332), (8711, 44720), (8944, 43555), (10664, 36530), (11180, 34844), (11240, 34658), (12083, 32240), (13330, 29224), (14612, 26660), (16120, 24166), (17329, 22480), (17422, 22360), (18265, 21328)]