21397440

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{719}}^1$

素因数の和:770

約数の個数: 112

約数和(自身を含む): 70225920

約数和(自身を除く): 48828480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 32, 40, 48, 60, 62, 64, 80, 93, 96, 120, 124, 155, 160, 186, 192, 240, 248, 310, 320, 372, 465, 480, 496, 620, 719, 744, 930, 960, 992, 1240, 1438, 1488, 1860, 1984, 2157, 2480, 2876, 2976, 3595, 3720, 4314, 4960, 5752, 5952, 7190, 7440, 8628, 9920, 10785, 11504, 14380, 14880, 17256, 21570, 22289, 23008, 28760, 29760, 34512, 43140, 44578, 46016, 57520, 66867, 69024, 86280, 89156, 111445, 115040, 133734, 138048, 172560, 178312, 222890, 230080, 267468, 334335, 345120, 356624, 445780, 534936, 668670, 690240, 713248, 891560, 1069872, 1337340, 1426496, 1783120, 2139744, 2674680, 3566240, 4279488, 5349360, 7132480, 10698720, 21397440]

約数ペア:

[(1, 21397440), (2, 10698720), (3, 7132480), (4, 5349360), (5, 4279488), (6, 3566240), (8, 2674680), (10, 2139744), (12, 1783120), (15, 1426496), (16, 1337340), (20, 1069872), (24, 891560), (30, 713248), (31, 690240), (32, 668670), (40, 534936), (48, 445780), (60, 356624), (62, 345120), (64, 334335), (80, 267468), (93, 230080), (96, 222890), (120, 178312), (124, 172560), (155, 138048), (160, 133734), (186, 115040), (192, 111445), (240, 89156), (248, 86280), (310, 69024), (320, 66867), (372, 57520), (465, 46016), (480, 44578), (496, 43140), (620, 34512), (719, 29760), (744, 28760), (930, 23008), (960, 22289), (992, 21570), (1240, 17256), (1438, 14880), (1488, 14380), (1860, 11504), (1984, 10785), (2157, 9920), (2480, 8628), (2876, 7440), (2976, 7190), (3595, 5952), (3720, 5752), (4314, 4960)]