20171888919

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{221891}}^1$

素因数の和:221957

約数の個数: 64

約数和(自身を含む): 37774894080

約数和(自身を除く): 17603005161

約数列:

[1, 3, 7, 9, 13, 21, 27, 37, 39, 63, 91, 111, 117, 189, 259, 273, 333, 351, 481, 777, 819, 999, 1443, 2331, 2457, 3367, 4329, 6993, 10101, 12987, 30303, 90909, 221891, 665673, 1553237, 1997019, 2884583, 4659711, 5991057, 8209967, 8653749, 13979133, 20192081, 24629901, 25961247, 41937399, 57469769, 60576243, 73889703, 77883741, 106729571, 172409307, 181728729, 221669109, 320188713, 517227921, 545186187, 747106997, 960566139, 1551683763, 2241320991, 2881698417, 6723962973, 20171888919]

約数ペア:

[(1, 20171888919), (3, 6723962973), (7, 2881698417), (9, 2241320991), (13, 1551683763), (21, 960566139), (27, 747106997), (37, 545186187), (39, 517227921), (63, 320188713), (91, 221669109), (111, 181728729), (117, 172409307), (189, 106729571), (259, 77883741), (273, 73889703), (333, 60576243), (351, 57469769), (481, 41937399), (777, 25961247), (819, 24629901), (999, 20192081), (1443, 13979133), (2331, 8653749), (2457, 8209967), (3367, 5991057), (4329, 4659711), (6993, 2884583), (10101, 1997019), (12987, 1553237), (30303, 665673), (90909, 221891)]