21501440

素因数分解:

$2^9\times 5^1\times {\mathrm{37}}^1\times {\mathrm{227}}^1$

素因数の和:287

約数の個数: 80

約数和(自身を含む): 53179632

約数和(自身を除く): 31678192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 227, 256, 296, 320, 370, 454, 512, 592, 640, 740, 908, 1135, 1184, 1280, 1480, 1816, 2270, 2368, 2560, 2960, 3632, 4540, 4736, 5920, 7264, 8399, 9080, 9472, 11840, 14528, 16798, 18160, 18944, 23680, 29056, 33596, 36320, 41995, 47360, 58112, 67192, 72640, 83990, 94720, 116224, 134384, 145280, 167980, 268768, 290560, 335960, 537536, 581120, 671920, 1075072, 1343840, 2150144, 2687680, 4300288, 5375360, 10750720, 21501440]

約数ペア:

[(1, 21501440), (2, 10750720), (4, 5375360), (5, 4300288), (8, 2687680), (10, 2150144), (16, 1343840), (20, 1075072), (32, 671920), (37, 581120), (40, 537536), (64, 335960), (74, 290560), (80, 268768), (128, 167980), (148, 145280), (160, 134384), (185, 116224), (227, 94720), (256, 83990), (296, 72640), (320, 67192), (370, 58112), (454, 47360), (512, 41995), (592, 36320), (640, 33596), (740, 29056), (908, 23680), (1135, 18944), (1184, 18160), (1280, 16798), (1480, 14528), (1816, 11840), (2270, 9472), (2368, 9080), (2560, 8399), (2960, 7264), (3632, 5920), (4540, 4736)]