19870994

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:171

約数の個数: 64

約数和(自身を含む): 38247552

約数和(自身を除く): 18376558

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 61, 67, 122, 134, 143, 187, 221, 286, 374, 442, 671, 737, 793, 871, 1037, 1139, 1342, 1474, 1586, 1742, 2074, 2278, 2431, 4087, 4862, 8174, 8723, 9581, 11407, 12529, 13481, 14807, 17446, 19162, 22814, 25058, 26962, 29614, 44957, 53131, 69479, 89914, 106262, 138958, 148291, 162877, 296582, 325754, 584441, 764269, 903227, 1168882, 1528538, 1806454, 9935497, 19870994]

約数ペア:

[(1, 19870994), (2, 9935497), (11, 1806454), (13, 1528538), (17, 1168882), (22, 903227), (26, 764269), (34, 584441), (61, 325754), (67, 296582), (122, 162877), (134, 148291), (143, 138958), (187, 106262), (221, 89914), (286, 69479), (374, 53131), (442, 44957), (671, 29614), (737, 26962), (793, 25058), (871, 22814), (1037, 19162), (1139, 17446), (1342, 14807), (1474, 13481), (1586, 12529), (1742, 11407), (2074, 9581), (2278, 8723), (2431, 8174), (4087, 4862)]