20956240

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{811}}^1$

素因数の和:860

約数の個数: 80

約数和(自身を含む): 54371520

約数和(自身を除く): 33415280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 760, 811, 1292, 1360, 1520, 1615, 1622, 2584, 3230, 3244, 4055, 5168, 6460, 6488, 8110, 12920, 12976, 13787, 15409, 16220, 25840, 27574, 30818, 32440, 55148, 61636, 64880, 68935, 77045, 110296, 123272, 137870, 154090, 220592, 246544, 261953, 275740, 308180, 523906, 551480, 616360, 1047812, 1102960, 1232720, 1309765, 2095624, 2619530, 4191248, 5239060, 10478120, 20956240]

約数ペア:

[(1, 20956240), (2, 10478120), (4, 5239060), (5, 4191248), (8, 2619530), (10, 2095624), (16, 1309765), (17, 1232720), (19, 1102960), (20, 1047812), (34, 616360), (38, 551480), (40, 523906), (68, 308180), (76, 275740), (80, 261953), (85, 246544), (95, 220592), (136, 154090), (152, 137870), (170, 123272), (190, 110296), (272, 77045), (304, 68935), (323, 64880), (340, 61636), (380, 55148), (646, 32440), (680, 30818), (760, 27574), (811, 25840), (1292, 16220), (1360, 15409), (1520, 13787), (1615, 12976), (1622, 12920), (2584, 8110), (3230, 6488), (3244, 6460), (4055, 5168)]