21285840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2861}}^1$

素因数の和:2908

約数の個数: 80

約数和(自身を含む): 68138496

約数和(自身を除く): 46852656

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 40, 48, 60, 62, 80, 93, 120, 124, 155, 186, 240, 248, 310, 372, 465, 496, 620, 744, 930, 1240, 1488, 1860, 2480, 2861, 3720, 5722, 7440, 8583, 11444, 14305, 17166, 22888, 28610, 34332, 42915, 45776, 57220, 68664, 85830, 88691, 114440, 137328, 171660, 177382, 228880, 266073, 343320, 354764, 443455, 532146, 686640, 709528, 886910, 1064292, 1330365, 1419056, 1773820, 2128584, 2660730, 3547640, 4257168, 5321460, 7095280, 10642920, 21285840]

約数ペア:

[(1, 21285840), (2, 10642920), (3, 7095280), (4, 5321460), (5, 4257168), (6, 3547640), (8, 2660730), (10, 2128584), (12, 1773820), (15, 1419056), (16, 1330365), (20, 1064292), (24, 886910), (30, 709528), (31, 686640), (40, 532146), (48, 443455), (60, 354764), (62, 343320), (80, 266073), (93, 228880), (120, 177382), (124, 171660), (155, 137328), (186, 114440), (240, 88691), (248, 85830), (310, 68664), (372, 57220), (465, 45776), (496, 42915), (620, 34332), (744, 28610), (930, 22888), (1240, 17166), (1488, 14305), (1860, 11444), (2480, 8583), (2861, 7440), (3720, 5722)]