21521560

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 51192000

約数和(自身を除く): 29670440

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 149, 157, 184, 230, 298, 314, 460, 596, 628, 745, 785, 920, 1192, 1256, 1490, 1570, 2980, 3140, 3427, 3611, 5960, 6280, 6854, 7222, 13708, 14444, 17135, 18055, 23393, 27416, 28888, 34270, 36110, 46786, 68540, 72220, 93572, 116965, 137080, 144440, 187144, 233930, 467860, 538039, 935720, 1076078, 2152156, 2690195, 4304312, 5380390, 10760780, 21521560]

約数ペア:

[(1, 21521560), (2, 10760780), (4, 5380390), (5, 4304312), (8, 2690195), (10, 2152156), (20, 1076078), (23, 935720), (40, 538039), (46, 467860), (92, 233930), (115, 187144), (149, 144440), (157, 137080), (184, 116965), (230, 93572), (298, 72220), (314, 68540), (460, 46786), (596, 36110), (628, 34270), (745, 28888), (785, 27416), (920, 23393), (1192, 18055), (1256, 17135), (1490, 14444), (1570, 13708), (2980, 7222), (3140, 6854), (3427, 6280), (3611, 5960)]