21140835

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{191}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 34947072

約数和(自身を除く): 13806237

約数列:

[1, 3, 5, 15, 47, 141, 157, 191, 235, 471, 573, 705, 785, 955, 2355, 2865, 7379, 8977, 22137, 26931, 29987, 36895, 44885, 89961, 110685, 134655, 149935, 449805, 1409389, 4228167, 7046945, 21140835]

約数ペア:

[(1, 21140835), (3, 7046945), (5, 4228167), (15, 1409389), (47, 449805), (141, 149935), (157, 134655), (191, 110685), (235, 89961), (471, 44885), (573, 36895), (705, 29987), (785, 26931), (955, 22137), (2355, 8977), (2865, 7379)]