21731875

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1$

素因数の和:169

約数の個数: 40

約数和(自身を含む): 30927600

約数和(自身を除く): 9195725

約数列:

[1, 5, 11, 25, 29, 55, 109, 125, 145, 275, 319, 545, 625, 725, 1199, 1375, 1595, 2725, 3161, 3625, 5995, 6875, 7975, 13625, 15805, 18125, 29975, 34771, 39875, 68125, 79025, 149875, 173855, 199375, 395125, 749375, 869275, 1975625, 4346375, 21731875]

約数ペア:

[(1, 21731875), (5, 4346375), (11, 1975625), (25, 869275), (29, 749375), (55, 395125), (109, 199375), (125, 173855), (145, 149875), (275, 79025), (319, 68125), (545, 39875), (625, 34771), (725, 29975), (1199, 18125), (1375, 15805), (1595, 13625), (2725, 7975), (3161, 6875), (3625, 5995)]