21529040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1$

素因数の和:316

約数の個数: 80

約数和(自身を含む): 54663168

約数和(自身を除く): 33134128

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 127, 130, 163, 208, 254, 260, 326, 508, 520, 635, 652, 815, 1016, 1040, 1270, 1304, 1630, 1651, 2032, 2119, 2540, 2608, 3260, 3302, 4238, 5080, 6520, 6604, 8255, 8476, 10160, 10595, 13040, 13208, 16510, 16952, 20701, 21190, 26416, 33020, 33904, 41402, 42380, 66040, 82804, 84760, 103505, 132080, 165608, 169520, 207010, 269113, 331216, 414020, 538226, 828040, 1076452, 1345565, 1656080, 2152904, 2691130, 4305808, 5382260, 10764520, 21529040]

約数ペア:

[(1, 21529040), (2, 10764520), (4, 5382260), (5, 4305808), (8, 2691130), (10, 2152904), (13, 1656080), (16, 1345565), (20, 1076452), (26, 828040), (40, 538226), (52, 414020), (65, 331216), (80, 269113), (104, 207010), (127, 169520), (130, 165608), (163, 132080), (208, 103505), (254, 84760), (260, 82804), (326, 66040), (508, 42380), (520, 41402), (635, 33904), (652, 33020), (815, 26416), (1016, 21190), (1040, 20701), (1270, 16952), (1304, 16510), (1630, 13208), (1651, 13040), (2032, 10595), (2119, 10160), (2540, 8476), (2608, 8255), (3260, 6604), (3302, 6520), (4238, 5080)]