80720900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2003}}^1$

素因数の和:2061

約数の個数: 72

約数和(自身を含む): 194820864

約数和(自身を除く): 114099964

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 124, 130, 155, 260, 310, 325, 403, 620, 650, 775, 806, 1300, 1550, 1612, 2003, 2015, 3100, 4006, 4030, 8012, 8060, 10015, 10075, 20030, 20150, 26039, 40060, 40300, 50075, 52078, 62093, 100150, 104156, 124186, 130195, 200300, 248372, 260390, 310465, 520780, 620930, 650975, 807209, 1241860, 1301950, 1552325, 1614418, 2603900, 3104650, 3228836, 4036045, 6209300, 8072090, 16144180, 20180225, 40360450, 80720900]

約数ペア:

[(1, 80720900), (2, 40360450), (4, 20180225), (5, 16144180), (10, 8072090), (13, 6209300), (20, 4036045), (25, 3228836), (26, 3104650), (31, 2603900), (50, 1614418), (52, 1552325), (62, 1301950), (65, 1241860), (100, 807209), (124, 650975), (130, 620930), (155, 520780), (260, 310465), (310, 260390), (325, 248372), (403, 200300), (620, 130195), (650, 124186), (775, 104156), (806, 100150), (1300, 62093), (1550, 52078), (1612, 50075), (2003, 40300), (2015, 40060), (3100, 26039), (4006, 20150), (4030, 20030), (8012, 10075), (8060, 10015)]