20281778

素因数分解:

$2^1\times {\mathrm{11}}^3\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 35311680

約数和(自身を除く): 15029902

約数列:

[1, 2, 11, 19, 22, 38, 121, 209, 242, 401, 418, 802, 1331, 2299, 2662, 4411, 4598, 7619, 8822, 15238, 25289, 48521, 50578, 83809, 97042, 167618, 533731, 921899, 1067462, 1843798, 10140889, 20281778]

約数ペア:

[(1, 20281778), (2, 10140889), (11, 1843798), (19, 1067462), (22, 921899), (38, 533731), (121, 167618), (209, 97042), (242, 83809), (401, 50578), (418, 48521), (802, 25289), (1331, 15238), (2299, 8822), (2662, 7619), (4411, 4598)]