21988920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:325

約数の個数: 128

約数和(自身を含む): 71331840

約数和(自身を除く): 49342920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 31, 40, 46, 60, 62, 69, 92, 93, 115, 120, 124, 138, 155, 184, 186, 230, 248, 257, 276, 310, 345, 372, 460, 465, 514, 552, 620, 690, 713, 744, 771, 920, 930, 1028, 1240, 1285, 1380, 1426, 1542, 1860, 2056, 2139, 2570, 2760, 2852, 3084, 3565, 3720, 3855, 4278, 5140, 5704, 5911, 6168, 7130, 7710, 7967, 8556, 10280, 10695, 11822, 14260, 15420, 15934, 17112, 17733, 21390, 23644, 23901, 28520, 29555, 30840, 31868, 35466, 39835, 42780, 47288, 47802, 59110, 63736, 70932, 79670, 85560, 88665, 95604, 118220, 119505, 141864, 159340, 177330, 183241, 191208, 236440, 239010, 318680, 354660, 366482, 478020, 549723, 709320, 732964, 916205, 956040, 1099446, 1465928, 1832410, 2198892, 2748615, 3664820, 4397784, 5497230, 7329640, 10994460, 21988920]

約数ペア:

[(1, 21988920), (2, 10994460), (3, 7329640), (4, 5497230), (5, 4397784), (6, 3664820), (8, 2748615), (10, 2198892), (12, 1832410), (15, 1465928), (20, 1099446), (23, 956040), (24, 916205), (30, 732964), (31, 709320), (40, 549723), (46, 478020), (60, 366482), (62, 354660), (69, 318680), (92, 239010), (93, 236440), (115, 191208), (120, 183241), (124, 177330), (138, 159340), (155, 141864), (184, 119505), (186, 118220), (230, 95604), (248, 88665), (257, 85560), (276, 79670), (310, 70932), (345, 63736), (372, 59110), (460, 47802), (465, 47288), (514, 42780), (552, 39835), (620, 35466), (690, 31868), (713, 30840), (744, 29555), (771, 28520), (920, 23901), (930, 23644), (1028, 21390), (1240, 17733), (1285, 17112), (1380, 15934), (1426, 15420), (1542, 14260), (1860, 11822), (2056, 10695), (2139, 10280), (2570, 8556), (2760, 7967), (2852, 7710), (3084, 7130), (3565, 6168), (3720, 5911), (3855, 5704), (4278, 5140)]