20638345

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{677}}^1$

素因数の和:769

約数の個数: 32

約数和(自身を含む): 30981888

約数和(自身を除く): 10343543

約数列:

[1, 5, 7, 13, 35, 65, 67, 91, 335, 455, 469, 677, 871, 2345, 3385, 4355, 4739, 6097, 8801, 23695, 30485, 44005, 45359, 61607, 226795, 308035, 317513, 589667, 1587565, 2948335, 4127669, 20638345]

約数ペア:

[(1, 20638345), (5, 4127669), (7, 2948335), (13, 1587565), (35, 589667), (65, 317513), (67, 308035), (91, 226795), (335, 61607), (455, 45359), (469, 44005), (677, 30485), (871, 23695), (2345, 8801), (3385, 6097), (4355, 4739)]