20181825

素因数分解:

$3^3\times 5^2\times {\mathrm{29}}^1\times {\mathrm{1031}}^1$

素因数の和:1079

約数の個数: 48

約数和(自身を含む): 38390400

約数和(自身を除く): 18208575

約数列:

[1, 3, 5, 9, 15, 25, 27, 29, 45, 75, 87, 135, 145, 225, 261, 435, 675, 725, 783, 1031, 1305, 2175, 3093, 3915, 5155, 6525, 9279, 15465, 19575, 25775, 27837, 29899, 46395, 77325, 89697, 139185, 149495, 231975, 269091, 448485, 695925, 747475, 807273, 1345455, 2242425, 4036365, 6727275, 20181825]

約数ペア:

[(1, 20181825), (3, 6727275), (5, 4036365), (9, 2242425), (15, 1345455), (25, 807273), (27, 747475), (29, 695925), (45, 448485), (75, 269091), (87, 231975), (135, 149495), (145, 139185), (225, 89697), (261, 77325), (435, 46395), (675, 29899), (725, 27837), (783, 25775), (1031, 19575), (1305, 15465), (2175, 9279), (3093, 6525), (3915, 5155)]