20856075

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 36664320

約数和(自身を除く): 15808245

約数列:

[1, 3, 5, 15, 25, 29, 43, 75, 87, 129, 145, 215, 223, 435, 645, 669, 725, 1075, 1115, 1247, 2175, 3225, 3345, 3741, 5575, 6235, 6467, 9589, 16725, 18705, 19401, 28767, 31175, 32335, 47945, 93525, 97005, 143835, 161675, 239725, 278081, 485025, 719175, 834243, 1390405, 4171215, 6952025, 20856075]

約数ペア:

[(1, 20856075), (3, 6952025), (5, 4171215), (15, 1390405), (25, 834243), (29, 719175), (43, 485025), (75, 278081), (87, 239725), (129, 161675), (145, 143835), (215, 97005), (223, 93525), (435, 47945), (645, 32335), (669, 31175), (725, 28767), (1075, 19401), (1115, 18705), (1247, 16725), (2175, 9589), (3225, 6467), (3345, 6235), (3741, 5575)]