20828960

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^2$

素因数の和:178

約数の個数: 72

約数和(自身を含む): 51676380

約数和(自身を除く): 30847420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 67, 80, 116, 134, 145, 160, 232, 268, 290, 335, 464, 536, 580, 670, 928, 1072, 1160, 1340, 1943, 2144, 2320, 2680, 3886, 4489, 4640, 5360, 7772, 8978, 9715, 10720, 15544, 17956, 19430, 22445, 31088, 35912, 38860, 44890, 62176, 71824, 77720, 89780, 130181, 143648, 155440, 179560, 260362, 310880, 359120, 520724, 650905, 718240, 1041448, 1301810, 2082896, 2603620, 4165792, 5207240, 10414480, 20828960]

約数ペア:

[(1, 20828960), (2, 10414480), (4, 5207240), (5, 4165792), (8, 2603620), (10, 2082896), (16, 1301810), (20, 1041448), (29, 718240), (32, 650905), (40, 520724), (58, 359120), (67, 310880), (80, 260362), (116, 179560), (134, 155440), (145, 143648), (160, 130181), (232, 89780), (268, 77720), (290, 71824), (335, 62176), (464, 44890), (536, 38860), (580, 35912), (670, 31088), (928, 22445), (1072, 19430), (1160, 17956), (1340, 15544), (1943, 10720), (2144, 9715), (2320, 8978), (2680, 7772), (3886, 5360), (4489, 4640)]