18989346980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1\times {\mathrm{76379}}^1$

素因数の和:76820

約数の個数: 48

約数和(自身を含む): 41267197440

約数和(自身を除く): 22277850460

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 401, 620, 802, 1604, 2005, 4010, 8020, 12431, 24862, 49724, 62155, 76379, 124310, 152758, 248620, 305516, 381895, 763790, 1527580, 2367749, 4735498, 9470996, 11838745, 23677490, 30627979, 47354980, 61255958, 122511916, 153139895, 306279790, 612559580, 949467349, 1898934698, 3797869396, 4747336745, 9494673490, 18989346980]

約数ペア:

[(1, 18989346980), (2, 9494673490), (4, 4747336745), (5, 3797869396), (10, 1898934698), (20, 949467349), (31, 612559580), (62, 306279790), (124, 153139895), (155, 122511916), (310, 61255958), (401, 47354980), (620, 30627979), (802, 23677490), (1604, 11838745), (2005, 9470996), (4010, 4735498), (8020, 2367749), (12431, 1527580), (24862, 763790), (49724, 381895), (62155, 305516), (76379, 248620), (124310, 152758)]