20291840

素因数分解:

$2^8\times 5^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 49448448

約数和(自身を除く): 29156608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 128, 160, 166, 191, 256, 320, 332, 382, 415, 640, 664, 764, 830, 955, 1280, 1328, 1528, 1660, 1910, 2656, 3056, 3320, 3820, 5312, 6112, 6640, 7640, 10624, 12224, 13280, 15280, 15853, 21248, 24448, 26560, 30560, 31706, 48896, 53120, 61120, 63412, 79265, 106240, 122240, 126824, 158530, 244480, 253648, 317060, 507296, 634120, 1014592, 1268240, 2029184, 2536480, 4058368, 5072960, 10145920, 20291840]

約数ペア:

[(1, 20291840), (2, 10145920), (4, 5072960), (5, 4058368), (8, 2536480), (10, 2029184), (16, 1268240), (20, 1014592), (32, 634120), (40, 507296), (64, 317060), (80, 253648), (83, 244480), (128, 158530), (160, 126824), (166, 122240), (191, 106240), (256, 79265), (320, 63412), (332, 61120), (382, 53120), (415, 48896), (640, 31706), (664, 30560), (764, 26560), (830, 24448), (955, 21248), (1280, 15853), (1328, 15280), (1528, 13280), (1660, 12224), (1910, 10624), (2656, 7640), (3056, 6640), (3320, 6112), (3820, 5312)]