210813980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{97}}^1\times {\mathrm{643}}^1$

素因数の和:775

約数の個数: 72

約数和(自身を含む): 485078832

約数和(自身を除く): 274264852

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 169, 194, 260, 338, 388, 485, 643, 676, 845, 970, 1261, 1286, 1690, 1940, 2522, 2572, 3215, 3380, 5044, 6305, 6430, 8359, 12610, 12860, 16393, 16718, 25220, 32786, 33436, 41795, 62371, 65572, 81965, 83590, 108667, 124742, 163930, 167180, 217334, 249484, 311855, 327860, 434668, 543335, 623710, 810823, 1086670, 1247420, 1621646, 2173340, 3243292, 4054115, 8108230, 10540699, 16216460, 21081398, 42162796, 52703495, 105406990, 210813980]

約数ペア:

[(1, 210813980), (2, 105406990), (4, 52703495), (5, 42162796), (10, 21081398), (13, 16216460), (20, 10540699), (26, 8108230), (52, 4054115), (65, 3243292), (97, 2173340), (130, 1621646), (169, 1247420), (194, 1086670), (260, 810823), (338, 623710), (388, 543335), (485, 434668), (643, 327860), (676, 311855), (845, 249484), (970, 217334), (1261, 167180), (1286, 163930), (1690, 124742), (1940, 108667), (2522, 83590), (2572, 81965), (3215, 65572), (3380, 62371), (5044, 41795), (6305, 33436), (6430, 32786), (8359, 25220), (12610, 16718), (12860, 16393)]