78981890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1979}}^1$

素因数の和:2306

約数の個数: 32

約数和(自身を含む): 153679680

約数和(自身を除く): 74697790

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 307, 614, 1535, 1979, 3070, 3958, 3991, 7982, 9895, 19790, 19955, 25727, 39910, 51454, 128635, 257270, 607553, 1215106, 3037765, 6075530, 7898189, 15796378, 39490945, 78981890]

約数ペア:

[(1, 78981890), (2, 39490945), (5, 15796378), (10, 7898189), (13, 6075530), (26, 3037765), (65, 1215106), (130, 607553), (307, 257270), (614, 128635), (1535, 51454), (1979, 39910), (3070, 25727), (3958, 19955), (3991, 19790), (7982, 9895)]