281271640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{540907}}^1$

素因数の和:540931

約数の個数: 32

約数和(自身を含む): 681544080

約数和(自身を除く): 400272440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 540907, 1081814, 2163628, 2704535, 4327256, 5409070, 7031791, 10818140, 14063582, 21636280, 28127164, 35158955, 56254328, 70317910, 140635820, 281271640]

約数ペア:

[(1, 281271640), (2, 140635820), (4, 70317910), (5, 56254328), (8, 35158955), (10, 28127164), (13, 21636280), (20, 14063582), (26, 10818140), (40, 7031791), (52, 5409070), (65, 4327256), (104, 2704535), (130, 2163628), (260, 1081814), (520, 540907)]