21087319720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{459619}}^1$

素因数の和:459698

約数の個数: 64

約数和(自身を含む): 50300812800

約数和(自身を除く): 29213493080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 620, 740, 1147, 1240, 1480, 2294, 4588, 5735, 9176, 11470, 22940, 45880, 459619, 919238, 1838476, 2298095, 3676952, 4596190, 9192380, 14248189, 17005903, 18384760, 28496378, 34011806, 56992756, 68023612, 71240945, 85029515, 113985512, 136047224, 142481890, 170059030, 284963780, 340118060, 527182993, 569927560, 680236120, 1054365986, 2108731972, 2635914965, 4217463944, 5271829930, 10543659860, 21087319720]

約数ペア:

[(1, 21087319720), (2, 10543659860), (4, 5271829930), (5, 4217463944), (8, 2635914965), (10, 2108731972), (20, 1054365986), (31, 680236120), (37, 569927560), (40, 527182993), (62, 340118060), (74, 284963780), (124, 170059030), (148, 142481890), (155, 136047224), (185, 113985512), (248, 85029515), (296, 71240945), (310, 68023612), (370, 56992756), (620, 34011806), (740, 28496378), (1147, 18384760), (1240, 17005903), (1480, 14248189), (2294, 9192380), (4588, 4596190), (5735, 3676952), (9176, 2298095), (11470, 1838476), (22940, 919238), (45880, 459619)]