20629760

素因数分解:

$2^8\times 5^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:319

約数の個数: 72

約数和(自身を含む): 50331456

約数和(自身を除く): 29701696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 227, 256, 284, 320, 355, 454, 568, 640, 710, 908, 1135, 1136, 1280, 1420, 1816, 2270, 2272, 2840, 3632, 4540, 4544, 5680, 7264, 9080, 9088, 11360, 14528, 16117, 18160, 18176, 22720, 29056, 32234, 36320, 45440, 58112, 64468, 72640, 80585, 90880, 128936, 145280, 161170, 257872, 290560, 322340, 515744, 644680, 1031488, 1289360, 2062976, 2578720, 4125952, 5157440, 10314880, 20629760]

約数ペア:

[(1, 20629760), (2, 10314880), (4, 5157440), (5, 4125952), (8, 2578720), (10, 2062976), (16, 1289360), (20, 1031488), (32, 644680), (40, 515744), (64, 322340), (71, 290560), (80, 257872), (128, 161170), (142, 145280), (160, 128936), (227, 90880), (256, 80585), (284, 72640), (320, 64468), (355, 58112), (454, 45440), (568, 36320), (640, 32234), (710, 29056), (908, 22720), (1135, 18176), (1136, 18160), (1280, 16117), (1420, 14528), (1816, 11360), (2270, 9088), (2272, 9080), (2840, 7264), (3632, 5680), (4540, 4544)]