20951004879

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1\times {\mathrm{54437}}^1$

素因数の和:54640

約数の個数: 48

約数和(自身を含む): 35667777600

約数和(自身を除く): 14716772721

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 149, 287, 369, 447, 861, 1043, 1341, 2583, 3129, 6109, 9387, 18327, 42763, 54437, 54981, 128289, 163311, 381059, 384867, 489933, 1143177, 2231917, 3429531, 6695751, 8111113, 15623419, 20087253, 24333339, 46870257, 56777791, 73000017, 140610771, 170333373, 332555633, 511000119, 997666899, 2327889431, 2993000697, 6983668293, 20951004879]

約数ペア:

[(1, 20951004879), (3, 6983668293), (7, 2993000697), (9, 2327889431), (21, 997666899), (41, 511000119), (63, 332555633), (123, 170333373), (149, 140610771), (287, 73000017), (369, 56777791), (447, 46870257), (861, 24333339), (1043, 20087253), (1341, 15623419), (2583, 8111113), (3129, 6695751), (6109, 3429531), (9387, 2231917), (18327, 1143177), (42763, 489933), (54437, 384867), (54981, 381059), (128289, 163311)]