254709640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{281}}^1$

素因数の和:383

約数の個数: 128

約数和(自身を含む): 643230720

約数和(自身を除く): 388521080

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 43, 62, 68, 85, 86, 124, 136, 155, 170, 172, 215, 248, 281, 310, 340, 344, 430, 527, 562, 620, 680, 731, 860, 1054, 1124, 1240, 1333, 1405, 1462, 1720, 2108, 2248, 2635, 2666, 2810, 2924, 3655, 4216, 4777, 5270, 5332, 5620, 5848, 6665, 7310, 8711, 9554, 10540, 10664, 11240, 12083, 13330, 14620, 17422, 19108, 21080, 22661, 23885, 24166, 26660, 29240, 34844, 38216, 43555, 45322, 47770, 48332, 53320, 60415, 69688, 87110, 90644, 95540, 96664, 113305, 120830, 148087, 174220, 181288, 191080, 205411, 226610, 241660, 296174, 348440, 374573, 410822, 453220, 483320, 592348, 740435, 749146, 821644, 906440, 1027055, 1184696, 1480870, 1498292, 1643288, 1872865, 2054110, 2961740, 2996584, 3745730, 4108220, 5923480, 6367741, 7491460, 8216440, 12735482, 14982920, 25470964, 31838705, 50941928, 63677410, 127354820, 254709640]

約数ペア:

[(1, 254709640), (2, 127354820), (4, 63677410), (5, 50941928), (8, 31838705), (10, 25470964), (17, 14982920), (20, 12735482), (31, 8216440), (34, 7491460), (40, 6367741), (43, 5923480), (62, 4108220), (68, 3745730), (85, 2996584), (86, 2961740), (124, 2054110), (136, 1872865), (155, 1643288), (170, 1498292), (172, 1480870), (215, 1184696), (248, 1027055), (281, 906440), (310, 821644), (340, 749146), (344, 740435), (430, 592348), (527, 483320), (562, 453220), (620, 410822), (680, 374573), (731, 348440), (860, 296174), (1054, 241660), (1124, 226610), (1240, 205411), (1333, 191080), (1405, 181288), (1462, 174220), (1720, 148087), (2108, 120830), (2248, 113305), (2635, 96664), (2666, 95540), (2810, 90644), (2924, 87110), (3655, 69688), (4216, 60415), (4777, 53320), (5270, 48332), (5332, 47770), (5620, 45322), (5848, 43555), (6665, 38216), (7310, 34844), (8711, 29240), (9554, 26660), (10540, 24166), (10664, 23885), (11240, 22661), (12083, 21080), (13330, 19108), (14620, 17422)]