19989960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{239}}^1$

素因数の和:311

約数の個数: 128

約数和(自身を含む): 65318400

約数和(自身を除く): 45328440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 41, 51, 60, 68, 82, 85, 102, 120, 123, 136, 164, 170, 204, 205, 239, 246, 255, 328, 340, 408, 410, 478, 492, 510, 615, 680, 697, 717, 820, 956, 984, 1020, 1195, 1230, 1394, 1434, 1640, 1912, 2040, 2091, 2390, 2460, 2788, 2868, 3485, 3585, 4063, 4182, 4780, 4920, 5576, 5736, 6970, 7170, 8126, 8364, 9560, 9799, 10455, 12189, 13940, 14340, 16252, 16728, 19598, 20315, 20910, 24378, 27880, 28680, 29397, 32504, 39196, 40630, 41820, 48756, 48995, 58794, 60945, 78392, 81260, 83640, 97512, 97990, 117588, 121890, 146985, 162520, 166583, 195980, 235176, 243780, 293970, 333166, 391960, 487560, 499749, 587940, 666332, 832915, 999498, 1175880, 1332664, 1665830, 1998996, 2498745, 3331660, 3997992, 4997490, 6663320, 9994980, 19989960]

約数ペア:

[(1, 19989960), (2, 9994980), (3, 6663320), (4, 4997490), (5, 3997992), (6, 3331660), (8, 2498745), (10, 1998996), (12, 1665830), (15, 1332664), (17, 1175880), (20, 999498), (24, 832915), (30, 666332), (34, 587940), (40, 499749), (41, 487560), (51, 391960), (60, 333166), (68, 293970), (82, 243780), (85, 235176), (102, 195980), (120, 166583), (123, 162520), (136, 146985), (164, 121890), (170, 117588), (204, 97990), (205, 97512), (239, 83640), (246, 81260), (255, 78392), (328, 60945), (340, 58794), (408, 48995), (410, 48756), (478, 41820), (492, 40630), (510, 39196), (615, 32504), (680, 29397), (697, 28680), (717, 27880), (820, 24378), (956, 20910), (984, 20315), (1020, 19598), (1195, 16728), (1230, 16252), (1394, 14340), (1434, 13940), (1640, 12189), (1912, 10455), (2040, 9799), (2091, 9560), (2390, 8364), (2460, 8126), (2788, 7170), (2868, 6970), (3485, 5736), (3585, 5576), (4063, 4920), (4182, 4780)]