81880340

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{1787}}^1$

素因数の和:1904

約数の個数: 48

約数和(自身を含む): 180230400

約数和(自身を除く): 98350060

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 580, 790, 1580, 1787, 2291, 3574, 4582, 7148, 8935, 9164, 11455, 17870, 22910, 35740, 45820, 51823, 103646, 141173, 207292, 259115, 282346, 518230, 564692, 705865, 1036460, 1411730, 2823460, 4094017, 8188034, 16376068, 20470085, 40940170, 81880340]

約数ペア:

[(1, 81880340), (2, 40940170), (4, 20470085), (5, 16376068), (10, 8188034), (20, 4094017), (29, 2823460), (58, 1411730), (79, 1036460), (116, 705865), (145, 564692), (158, 518230), (290, 282346), (316, 259115), (395, 207292), (580, 141173), (790, 103646), (1580, 51823), (1787, 45820), (2291, 35740), (3574, 22910), (4582, 17870), (7148, 11455), (8935, 9164)]