21182980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:245

約数の個数: 96

約数和(自身を含む): 55770624

約数和(自身を除く): 34587644

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 103, 113, 130, 140, 182, 206, 226, 260, 364, 412, 452, 455, 515, 565, 721, 791, 910, 1030, 1130, 1339, 1442, 1469, 1582, 1820, 2060, 2260, 2678, 2884, 2938, 3164, 3605, 3955, 5356, 5876, 6695, 7210, 7345, 7910, 9373, 10283, 11639, 13390, 14420, 14690, 15820, 18746, 20566, 23278, 26780, 29380, 37492, 41132, 46556, 46865, 51415, 58195, 81473, 93730, 102830, 116390, 151307, 162946, 187460, 205660, 232780, 302614, 325892, 407365, 605228, 756535, 814730, 1059149, 1513070, 1629460, 2118298, 3026140, 4236596, 5295745, 10591490, 21182980]

約数ペア:

[(1, 21182980), (2, 10591490), (4, 5295745), (5, 4236596), (7, 3026140), (10, 2118298), (13, 1629460), (14, 1513070), (20, 1059149), (26, 814730), (28, 756535), (35, 605228), (52, 407365), (65, 325892), (70, 302614), (91, 232780), (103, 205660), (113, 187460), (130, 162946), (140, 151307), (182, 116390), (206, 102830), (226, 93730), (260, 81473), (364, 58195), (412, 51415), (452, 46865), (455, 46556), (515, 41132), (565, 37492), (721, 29380), (791, 26780), (910, 23278), (1030, 20566), (1130, 18746), (1339, 15820), (1442, 14690), (1469, 14420), (1582, 13390), (1820, 11639), (2060, 10283), (2260, 9373), (2678, 7910), (2884, 7345), (2938, 7210), (3164, 6695), (3605, 5876), (3955, 5356)]