21018868

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:137

約数の個数: 72

約数和(自身を含む): 44271360

約数和(自身を除く): 23252492

約数列:

[1, 2, 4, 13, 17, 26, 31, 34, 52, 59, 62, 68, 118, 124, 169, 221, 236, 338, 403, 442, 527, 676, 767, 806, 884, 1003, 1054, 1534, 1612, 1829, 2006, 2108, 2873, 3068, 3658, 4012, 5239, 5746, 6851, 7316, 9971, 10478, 11492, 13039, 13702, 19942, 20956, 23777, 26078, 27404, 31093, 39884, 47554, 52156, 62186, 89063, 95108, 124372, 169507, 178126, 309101, 339014, 356252, 404209, 618202, 678028, 808418, 1236404, 1616836, 5254717, 10509434, 21018868]

約数ペア:

[(1, 21018868), (2, 10509434), (4, 5254717), (13, 1616836), (17, 1236404), (26, 808418), (31, 678028), (34, 618202), (52, 404209), (59, 356252), (62, 339014), (68, 309101), (118, 178126), (124, 169507), (169, 124372), (221, 95108), (236, 89063), (338, 62186), (403, 52156), (442, 47554), (527, 39884), (676, 31093), (767, 27404), (806, 26078), (884, 23777), (1003, 20956), (1054, 19942), (1534, 13702), (1612, 13039), (1829, 11492), (2006, 10478), (2108, 9971), (2873, 7316), (3068, 6851), (3658, 5746), (4012, 5239)]