20673540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2671}}^1$

素因数の和:2729

約数の個数: 72

約数和(自身を含む): 64192128

約数和(自身を除く): 43518588

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2671, 3870, 5342, 7740, 8013, 10684, 13355, 16026, 24039, 26710, 32052, 40065, 48078, 53420, 80130, 96156, 114853, 120195, 160260, 229706, 240390, 344559, 459412, 480780, 574265, 689118, 1033677, 1148530, 1378236, 1722795, 2067354, 2297060, 3445590, 4134708, 5168385, 6891180, 10336770, 20673540]

約数ペア:

[(1, 20673540), (2, 10336770), (3, 6891180), (4, 5168385), (5, 4134708), (6, 3445590), (9, 2297060), (10, 2067354), (12, 1722795), (15, 1378236), (18, 1148530), (20, 1033677), (30, 689118), (36, 574265), (43, 480780), (45, 459412), (60, 344559), (86, 240390), (90, 229706), (129, 160260), (172, 120195), (180, 114853), (215, 96156), (258, 80130), (387, 53420), (430, 48078), (516, 40065), (645, 32052), (774, 26710), (860, 24039), (1290, 16026), (1548, 13355), (1935, 10684), (2580, 8013), (2671, 7740), (3870, 5342)]