28185040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{661}}^1$

素因数の和:728

約数の個数: 80

約数和(自身を含む): 72401616

約数和(自身を除く): 44216576

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 520, 533, 656, 661, 820, 1040, 1066, 1322, 1640, 2132, 2644, 2665, 3280, 3305, 4264, 5288, 5330, 6610, 8528, 8593, 10576, 10660, 13220, 17186, 21320, 26440, 27101, 34372, 42640, 42965, 52880, 54202, 68744, 85930, 108404, 135505, 137488, 171860, 216808, 271010, 343720, 352313, 433616, 542020, 687440, 704626, 1084040, 1409252, 1761565, 2168080, 2818504, 3523130, 5637008, 7046260, 14092520, 28185040]

約数ペア:

[(1, 28185040), (2, 14092520), (4, 7046260), (5, 5637008), (8, 3523130), (10, 2818504), (13, 2168080), (16, 1761565), (20, 1409252), (26, 1084040), (40, 704626), (41, 687440), (52, 542020), (65, 433616), (80, 352313), (82, 343720), (104, 271010), (130, 216808), (164, 171860), (205, 137488), (208, 135505), (260, 108404), (328, 85930), (410, 68744), (520, 54202), (533, 52880), (656, 42965), (661, 42640), (820, 34372), (1040, 27101), (1066, 26440), (1322, 21320), (1640, 17186), (2132, 13220), (2644, 10660), (2665, 10576), (3280, 8593), (3305, 8528), (4264, 6610), (5288, 5330)]