20721844

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2131}}^1$

素因数の和:2176

約数の個数: 48

約数和(自身を含む): 45130176

約数和(自身を除く): 24408332

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 52, 68, 143, 187, 221, 286, 374, 442, 572, 748, 884, 2131, 2431, 4262, 4862, 8524, 9724, 23441, 27703, 36227, 46882, 55406, 72454, 93764, 110812, 144908, 304733, 398497, 470951, 609466, 796994, 941902, 1218932, 1593988, 1883804, 5180461, 10360922, 20721844]

約数ペア:

[(1, 20721844), (2, 10360922), (4, 5180461), (11, 1883804), (13, 1593988), (17, 1218932), (22, 941902), (26, 796994), (34, 609466), (44, 470951), (52, 398497), (68, 304733), (143, 144908), (187, 110812), (221, 93764), (286, 72454), (374, 55406), (442, 46882), (572, 36227), (748, 27703), (884, 23441), (2131, 9724), (2431, 8524), (4262, 4862)]