21515600

素因数分解:

$2^4\times 5^2\times {\mathrm{19}}^2\times {\mathrm{149}}^1$

素因数の和:205

約数の個数: 90

約数和(自身を含む): 54921150

約数和(自身を除く): 33405550

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 38, 40, 50, 76, 80, 95, 100, 149, 152, 190, 200, 298, 304, 361, 380, 400, 475, 596, 722, 745, 760, 950, 1192, 1444, 1490, 1520, 1805, 1900, 2384, 2831, 2888, 2980, 3610, 3725, 3800, 5662, 5776, 5960, 7220, 7450, 7600, 9025, 11324, 11920, 14155, 14440, 14900, 18050, 22648, 28310, 28880, 29800, 36100, 45296, 53789, 56620, 59600, 70775, 72200, 107578, 113240, 141550, 144400, 215156, 226480, 268945, 283100, 430312, 537890, 566200, 860624, 1075780, 1132400, 1344725, 2151560, 2689450, 4303120, 5378900, 10757800, 21515600]

約数ペア:

[(1, 21515600), (2, 10757800), (4, 5378900), (5, 4303120), (8, 2689450), (10, 2151560), (16, 1344725), (19, 1132400), (20, 1075780), (25, 860624), (38, 566200), (40, 537890), (50, 430312), (76, 283100), (80, 268945), (95, 226480), (100, 215156), (149, 144400), (152, 141550), (190, 113240), (200, 107578), (298, 72200), (304, 70775), (361, 59600), (380, 56620), (400, 53789), (475, 45296), (596, 36100), (722, 29800), (745, 28880), (760, 28310), (950, 22648), (1192, 18050), (1444, 14900), (1490, 14440), (1520, 14155), (1805, 11920), (1900, 11324), (2384, 9025), (2831, 7600), (2888, 7450), (2980, 7220), (3610, 5960), (3725, 5776), (3800, 5662)]