20678040

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:897

約数の個数: 96

約数和(自身を含む): 68234400

約数和(自身を除く): 47556360

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 809, 852, 1065, 1278, 1420, 1618, 1704, 2130, 2427, 2556, 2840, 3195, 3236, 4045, 4260, 4854, 5112, 6390, 6472, 7281, 8090, 8520, 9708, 12135, 12780, 14562, 16180, 19416, 24270, 25560, 29124, 32360, 36405, 48540, 57439, 58248, 72810, 97080, 114878, 145620, 172317, 229756, 287195, 291240, 344634, 459512, 516951, 574390, 689268, 861585, 1033902, 1148780, 1378536, 1723170, 2067804, 2297560, 2584755, 3446340, 4135608, 5169510, 6892680, 10339020, 20678040]

約数ペア:

[(1, 20678040), (2, 10339020), (3, 6892680), (4, 5169510), (5, 4135608), (6, 3446340), (8, 2584755), (9, 2297560), (10, 2067804), (12, 1723170), (15, 1378536), (18, 1148780), (20, 1033902), (24, 861585), (30, 689268), (36, 574390), (40, 516951), (45, 459512), (60, 344634), (71, 291240), (72, 287195), (90, 229756), (120, 172317), (142, 145620), (180, 114878), (213, 97080), (284, 72810), (355, 58248), (360, 57439), (426, 48540), (568, 36405), (639, 32360), (710, 29124), (809, 25560), (852, 24270), (1065, 19416), (1278, 16180), (1420, 14562), (1618, 12780), (1704, 12135), (2130, 9708), (2427, 8520), (2556, 8090), (2840, 7281), (3195, 6472), (3236, 6390), (4045, 5112), (4260, 4854)]