18721404

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{367}}^1$

素因数の和:499

約数の個数: 72

約数和(自身を含む): 51571520

約数和(自身を除く): 32850116

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 109, 117, 156, 218, 234, 327, 367, 436, 468, 654, 734, 981, 1101, 1308, 1417, 1468, 1962, 2202, 2834, 3303, 3924, 4251, 4404, 4771, 5668, 6606, 8502, 9542, 12753, 13212, 14313, 17004, 19084, 25506, 28626, 40003, 42939, 51012, 57252, 80006, 85878, 120009, 160012, 171756, 240018, 360027, 480036, 520039, 720054, 1040078, 1440108, 1560117, 2080156, 3120234, 4680351, 6240468, 9360702, 18721404]

約数ペア:

[(1, 18721404), (2, 9360702), (3, 6240468), (4, 4680351), (6, 3120234), (9, 2080156), (12, 1560117), (13, 1440108), (18, 1040078), (26, 720054), (36, 520039), (39, 480036), (52, 360027), (78, 240018), (109, 171756), (117, 160012), (156, 120009), (218, 85878), (234, 80006), (327, 57252), (367, 51012), (436, 42939), (468, 40003), (654, 28626), (734, 25506), (981, 19084), (1101, 17004), (1308, 14313), (1417, 13212), (1468, 12753), (1962, 9542), (2202, 8502), (2834, 6606), (3303, 5668), (3924, 4771), (4251, 4404)]