20747696

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{491}}^1$

素因数の和:657

約数の個数: 40

約数和(自身を含む): 42705600

約数和(自身を除く): 21957904

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 139, 152, 278, 304, 491, 556, 982, 1112, 1964, 2224, 2641, 3928, 5282, 7856, 9329, 10564, 18658, 21128, 37316, 42256, 68249, 74632, 136498, 149264, 272996, 545992, 1091984, 1296731, 2593462, 5186924, 10373848, 20747696]

約数ペア:

[(1, 20747696), (2, 10373848), (4, 5186924), (8, 2593462), (16, 1296731), (19, 1091984), (38, 545992), (76, 272996), (139, 149264), (152, 136498), (278, 74632), (304, 68249), (491, 42256), (556, 37316), (982, 21128), (1112, 18658), (1964, 10564), (2224, 9329), (2641, 7856), (3928, 5282)]