21145100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:423

約数の個数: 72

約数和(自身を含む): 49996800

約数和(自身を除く): 28851700

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 31, 38, 50, 62, 76, 95, 100, 124, 155, 190, 310, 359, 380, 475, 589, 620, 718, 775, 950, 1178, 1436, 1550, 1795, 1900, 2356, 2945, 3100, 3590, 5890, 6821, 7180, 8975, 11129, 11780, 13642, 14725, 17950, 22258, 27284, 29450, 34105, 35900, 44516, 55645, 58900, 68210, 111290, 136420, 170525, 211451, 222580, 278225, 341050, 422902, 556450, 682100, 845804, 1057255, 1112900, 2114510, 4229020, 5286275, 10572550, 21145100]

約数ペア:

[(1, 21145100), (2, 10572550), (4, 5286275), (5, 4229020), (10, 2114510), (19, 1112900), (20, 1057255), (25, 845804), (31, 682100), (38, 556450), (50, 422902), (62, 341050), (76, 278225), (95, 222580), (100, 211451), (124, 170525), (155, 136420), (190, 111290), (310, 68210), (359, 58900), (380, 55645), (475, 44516), (589, 35900), (620, 34105), (718, 29450), (775, 27284), (950, 22258), (1178, 17950), (1436, 14725), (1550, 13642), (1795, 11780), (1900, 11129), (2356, 8975), (2945, 7180), (3100, 6821), (3590, 5890)]