81601280

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1723}}^1$

素因数の和:1781

約数の個数: 72

約数和(自身を含む): 200859792

約数和(自身を除く): 119258512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 592, 640, 740, 1184, 1280, 1480, 1723, 2368, 2960, 3446, 4736, 5920, 6892, 8615, 9472, 11840, 13784, 17230, 23680, 27568, 34460, 47360, 55136, 63751, 68920, 110272, 127502, 137840, 220544, 255004, 275680, 318755, 441088, 510008, 551360, 637510, 1020016, 1102720, 1275020, 2040032, 2205440, 2550040, 4080064, 5100080, 8160128, 10200160, 16320256, 20400320, 40800640, 81601280]

約数ペア:

[(1, 81601280), (2, 40800640), (4, 20400320), (5, 16320256), (8, 10200160), (10, 8160128), (16, 5100080), (20, 4080064), (32, 2550040), (37, 2205440), (40, 2040032), (64, 1275020), (74, 1102720), (80, 1020016), (128, 637510), (148, 551360), (160, 510008), (185, 441088), (256, 318755), (296, 275680), (320, 255004), (370, 220544), (592, 137840), (640, 127502), (740, 110272), (1184, 68920), (1280, 63751), (1480, 55136), (1723, 47360), (2368, 34460), (2960, 27568), (3446, 23680), (4736, 17230), (5920, 13784), (6892, 11840), (8615, 9472)]