20181525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2957}}^1$

素因数の和:2990

約数の個数: 48

約数和(自身を含む): 41080704

約数和(自身を除く): 20899179

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 65, 75, 91, 105, 175, 195, 273, 325, 455, 525, 975, 1365, 2275, 2957, 6825, 8871, 14785, 20699, 38441, 44355, 62097, 73925, 103495, 115323, 192205, 221775, 269087, 310485, 517475, 576615, 807261, 961025, 1345435, 1552425, 2883075, 4036305, 6727175, 20181525]

約数ペア:

[(1, 20181525), (3, 6727175), (5, 4036305), (7, 2883075), (13, 1552425), (15, 1345435), (21, 961025), (25, 807261), (35, 576615), (39, 517475), (65, 310485), (75, 269087), (91, 221775), (105, 192205), (175, 115323), (195, 103495), (273, 73925), (325, 62097), (455, 44355), (525, 38441), (975, 20699), (1365, 14785), (2275, 8871), (2957, 6825)]