18998480

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{431}}^1$

素因数の和:492

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 29212720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 38, 40, 58, 76, 80, 95, 116, 145, 152, 190, 232, 290, 304, 380, 431, 464, 551, 580, 760, 862, 1102, 1160, 1520, 1724, 2155, 2204, 2320, 2755, 3448, 4310, 4408, 5510, 6896, 8189, 8620, 8816, 11020, 12499, 16378, 17240, 22040, 24998, 32756, 34480, 40945, 44080, 49996, 62495, 65512, 81890, 99992, 124990, 131024, 163780, 199984, 237481, 249980, 327560, 474962, 499960, 655120, 949924, 999920, 1187405, 1899848, 2374810, 3799696, 4749620, 9499240, 18998480]

約数ペア:

[(1, 18998480), (2, 9499240), (4, 4749620), (5, 3799696), (8, 2374810), (10, 1899848), (16, 1187405), (19, 999920), (20, 949924), (29, 655120), (38, 499960), (40, 474962), (58, 327560), (76, 249980), (80, 237481), (95, 199984), (116, 163780), (145, 131024), (152, 124990), (190, 99992), (232, 81890), (290, 65512), (304, 62495), (380, 49996), (431, 44080), (464, 40945), (551, 34480), (580, 32756), (760, 24998), (862, 22040), (1102, 17240), (1160, 16378), (1520, 12499), (1724, 11020), (2155, 8816), (2204, 8620), (2320, 8189), (2755, 6896), (3448, 5510), (4310, 4408)]