21086780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1$

素因数の和:207

約数の個数: 96

約数和(自身を含む): 53258688

約数和(自身を除く): 32171908

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 73, 101, 110, 130, 143, 146, 202, 220, 260, 286, 292, 365, 404, 505, 572, 715, 730, 803, 949, 1010, 1111, 1313, 1430, 1460, 1606, 1898, 2020, 2222, 2626, 2860, 3212, 3796, 4015, 4444, 4745, 5252, 5555, 6565, 7373, 8030, 9490, 10439, 11110, 13130, 14443, 14746, 16060, 18980, 20878, 22220, 26260, 28886, 29492, 36865, 41756, 52195, 57772, 72215, 73730, 81103, 95849, 104390, 144430, 147460, 162206, 191698, 208780, 288860, 324412, 383396, 405515, 479245, 811030, 958490, 1054339, 1622060, 1916980, 2108678, 4217356, 5271695, 10543390, 21086780]

約数ペア:

[(1, 21086780), (2, 10543390), (4, 5271695), (5, 4217356), (10, 2108678), (11, 1916980), (13, 1622060), (20, 1054339), (22, 958490), (26, 811030), (44, 479245), (52, 405515), (55, 383396), (65, 324412), (73, 288860), (101, 208780), (110, 191698), (130, 162206), (143, 147460), (146, 144430), (202, 104390), (220, 95849), (260, 81103), (286, 73730), (292, 72215), (365, 57772), (404, 52195), (505, 41756), (572, 36865), (715, 29492), (730, 28886), (803, 26260), (949, 22220), (1010, 20878), (1111, 18980), (1313, 16060), (1430, 14746), (1460, 14443), (1606, 13130), (1898, 11110), (2020, 10439), (2222, 9490), (2626, 8030), (2860, 7373), (3212, 6565), (3796, 5555), (4015, 5252), (4444, 4745)]