20851688

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1657}}^1$

素因数の和:1698

約数の個数: 48

約数和(自身を含む): 46307940

約数和(自身を除く): 25456252

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 121, 143, 242, 286, 484, 572, 968, 1144, 1573, 1657, 3146, 3314, 6292, 6628, 12584, 13256, 18227, 21541, 36454, 43082, 72908, 86164, 145816, 172328, 200497, 236951, 400994, 473902, 801988, 947804, 1603976, 1895608, 2606461, 5212922, 10425844, 20851688]

約数ペア:

[(1, 20851688), (2, 10425844), (4, 5212922), (8, 2606461), (11, 1895608), (13, 1603976), (22, 947804), (26, 801988), (44, 473902), (52, 400994), (88, 236951), (104, 200497), (121, 172328), (143, 145816), (242, 86164), (286, 72908), (484, 43082), (572, 36454), (968, 21541), (1144, 18227), (1573, 13256), (1657, 12584), (3146, 6628), (3314, 6292)]