21125040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:171

約数の個数: 160

約数和(自身を含む): 70709760

約数和(自身を除く): 49584720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 43, 46, 48, 60, 69, 80, 86, 89, 92, 115, 120, 129, 138, 172, 178, 184, 215, 230, 240, 258, 267, 276, 344, 345, 356, 368, 430, 445, 460, 516, 534, 552, 645, 688, 690, 712, 860, 890, 920, 989, 1032, 1068, 1104, 1290, 1335, 1380, 1424, 1720, 1780, 1840, 1978, 2047, 2064, 2136, 2580, 2670, 2760, 2967, 3440, 3560, 3827, 3956, 4094, 4272, 4945, 5160, 5340, 5520, 5934, 6141, 7120, 7654, 7912, 8188, 9890, 10235, 10320, 10680, 11481, 11868, 12282, 14835, 15308, 15824, 16376, 19135, 19780, 20470, 21360, 22962, 23736, 24564, 29670, 30616, 30705, 32752, 38270, 39560, 40940, 45924, 47472, 49128, 57405, 59340, 61232, 61410, 76540, 79120, 81880, 88021, 91848, 98256, 114810, 118680, 122820, 153080, 163760, 176042, 183696, 229620, 237360, 245640, 264063, 306160, 352084, 440105, 459240, 491280, 528126, 704168, 880210, 918480, 1056252, 1320315, 1408336, 1760420, 2112504, 2640630, 3520840, 4225008, 5281260, 7041680, 10562520, 21125040]

約数ペア:

[(1, 21125040), (2, 10562520), (3, 7041680), (4, 5281260), (5, 4225008), (6, 3520840), (8, 2640630), (10, 2112504), (12, 1760420), (15, 1408336), (16, 1320315), (20, 1056252), (23, 918480), (24, 880210), (30, 704168), (40, 528126), (43, 491280), (46, 459240), (48, 440105), (60, 352084), (69, 306160), (80, 264063), (86, 245640), (89, 237360), (92, 229620), (115, 183696), (120, 176042), (129, 163760), (138, 153080), (172, 122820), (178, 118680), (184, 114810), (215, 98256), (230, 91848), (240, 88021), (258, 81880), (267, 79120), (276, 76540), (344, 61410), (345, 61232), (356, 59340), (368, 57405), (430, 49128), (445, 47472), (460, 45924), (516, 40940), (534, 39560), (552, 38270), (645, 32752), (688, 30705), (690, 30616), (712, 29670), (860, 24564), (890, 23736), (920, 22962), (989, 21360), (1032, 20470), (1068, 19780), (1104, 19135), (1290, 16376), (1335, 15824), (1380, 15308), (1424, 14835), (1720, 12282), (1780, 11868), (1840, 11481), (1978, 10680), (2047, 10320), (2064, 10235), (2136, 9890), (2580, 8188), (2670, 7912), (2760, 7654), (2967, 7120), (3440, 6141), (3560, 5934), (3827, 5520), (3956, 5340), (4094, 5160), (4272, 4945)]