21655348

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{131}}^1$

素因数の和:193

約数の個数: 72

約数和(自身を含む): 47656224

約数和(自身を除く): 26000876

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 52, 68, 131, 143, 187, 221, 262, 286, 289, 374, 442, 524, 572, 578, 748, 884, 1156, 1441, 1703, 2227, 2431, 2882, 3179, 3406, 3757, 4454, 4862, 5764, 6358, 6812, 7514, 8908, 9724, 12716, 15028, 18733, 24497, 28951, 37466, 37859, 41327, 48994, 57902, 74932, 75718, 82654, 97988, 115804, 151436, 165308, 318461, 416449, 492167, 636922, 832898, 984334, 1273844, 1665796, 1968668, 5413837, 10827674, 21655348]

約数ペア:

[(1, 21655348), (2, 10827674), (4, 5413837), (11, 1968668), (13, 1665796), (17, 1273844), (22, 984334), (26, 832898), (34, 636922), (44, 492167), (52, 416449), (68, 318461), (131, 165308), (143, 151436), (187, 115804), (221, 97988), (262, 82654), (286, 75718), (289, 74932), (374, 57902), (442, 48994), (524, 41327), (572, 37859), (578, 37466), (748, 28951), (884, 24497), (1156, 18733), (1441, 15028), (1703, 12716), (2227, 9724), (2431, 8908), (2882, 7514), (3179, 6812), (3406, 6358), (3757, 5764), (4454, 4862)]