20551388

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 96

約数和(自身を含む): 46663680

約数和(自身を除く): 26112292

約数列:

[1, 2, 4, 11, 13, 19, 22, 26, 31, 38, 44, 52, 61, 62, 76, 122, 124, 143, 209, 244, 247, 286, 341, 403, 418, 494, 572, 589, 671, 682, 793, 806, 836, 988, 1159, 1178, 1342, 1364, 1586, 1612, 1891, 2318, 2356, 2684, 2717, 3172, 3782, 4433, 4636, 5434, 6479, 7564, 7657, 8723, 8866, 10868, 12749, 12958, 15067, 15314, 17446, 17732, 20801, 24583, 25498, 25916, 30134, 30628, 34892, 35929, 41602, 49166, 50996, 60268, 71858, 83204, 84227, 98332, 143716, 165737, 168454, 270413, 331474, 336908, 395219, 467077, 540826, 662948, 790438, 934154, 1081652, 1580876, 1868308, 5137847, 10275694, 20551388]

約数ペア:

[(1, 20551388), (2, 10275694), (4, 5137847), (11, 1868308), (13, 1580876), (19, 1081652), (22, 934154), (26, 790438), (31, 662948), (38, 540826), (44, 467077), (52, 395219), (61, 336908), (62, 331474), (76, 270413), (122, 168454), (124, 165737), (143, 143716), (209, 98332), (244, 84227), (247, 83204), (286, 71858), (341, 60268), (403, 50996), (418, 49166), (494, 41602), (572, 35929), (589, 34892), (671, 30628), (682, 30134), (793, 25916), (806, 25498), (836, 24583), (988, 20801), (1159, 17732), (1178, 17446), (1342, 15314), (1364, 15067), (1586, 12958), (1612, 12749), (1891, 10868), (2318, 8866), (2356, 8723), (2684, 7657), (2717, 7564), (3172, 6479), (3782, 5434), (4433, 4636)]