21235040

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:280

約数の個数: 96

約数和(自身を含む): 54813024

約数和(自身を除く): 33577984

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 37, 40, 68, 74, 80, 85, 136, 148, 160, 170, 185, 211, 272, 296, 340, 370, 422, 544, 592, 629, 680, 740, 844, 1055, 1184, 1258, 1360, 1480, 1688, 2110, 2516, 2720, 2960, 3145, 3376, 3587, 4220, 5032, 5920, 6290, 6752, 7174, 7807, 8440, 10064, 12580, 14348, 15614, 16880, 17935, 20128, 25160, 28696, 31228, 33760, 35870, 39035, 50320, 57392, 62456, 71740, 78070, 100640, 114784, 124912, 132719, 143480, 156140, 249824, 265438, 286960, 312280, 530876, 573920, 624560, 663595, 1061752, 1249120, 1327190, 2123504, 2654380, 4247008, 5308760, 10617520, 21235040]

約数ペア:

[(1, 21235040), (2, 10617520), (4, 5308760), (5, 4247008), (8, 2654380), (10, 2123504), (16, 1327190), (17, 1249120), (20, 1061752), (32, 663595), (34, 624560), (37, 573920), (40, 530876), (68, 312280), (74, 286960), (80, 265438), (85, 249824), (136, 156140), (148, 143480), (160, 132719), (170, 124912), (185, 114784), (211, 100640), (272, 78070), (296, 71740), (340, 62456), (370, 57392), (422, 50320), (544, 39035), (592, 35870), (629, 33760), (680, 31228), (740, 28696), (844, 25160), (1055, 20128), (1184, 17935), (1258, 16880), (1360, 15614), (1480, 14348), (1688, 12580), (2110, 10064), (2516, 8440), (2720, 7807), (2960, 7174), (3145, 6752), (3376, 6290), (3587, 5920), (4220, 5032)]