21294320

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:270

約数の個数: 80

約数和(自身を含む): 52710912

約数和(自身を除く): 31416592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 71, 80, 92, 115, 142, 163, 184, 230, 284, 326, 355, 368, 460, 568, 652, 710, 815, 920, 1136, 1304, 1420, 1630, 1633, 1840, 2608, 2840, 3260, 3266, 3749, 5680, 6520, 6532, 7498, 8165, 11573, 13040, 13064, 14996, 16330, 18745, 23146, 26128, 29992, 32660, 37490, 46292, 57865, 59984, 65320, 74980, 92584, 115730, 130640, 149960, 185168, 231460, 266179, 299920, 462920, 532358, 925840, 1064716, 1330895, 2129432, 2661790, 4258864, 5323580, 10647160, 21294320]

約数ペア:

[(1, 21294320), (2, 10647160), (4, 5323580), (5, 4258864), (8, 2661790), (10, 2129432), (16, 1330895), (20, 1064716), (23, 925840), (40, 532358), (46, 462920), (71, 299920), (80, 266179), (92, 231460), (115, 185168), (142, 149960), (163, 130640), (184, 115730), (230, 92584), (284, 74980), (326, 65320), (355, 59984), (368, 57865), (460, 46292), (568, 37490), (652, 32660), (710, 29992), (815, 26128), (920, 23146), (1136, 18745), (1304, 16330), (1420, 14996), (1630, 13064), (1633, 13040), (1840, 11573), (2608, 8165), (2840, 7498), (3260, 6532), (3266, 6520), (3749, 5680)]