21699580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{293}}^1$

素因数の和:355

約数の個数: 72

約数和(自身を含む): 54627552

約数和(自身を除く): 32927972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 293, 322, 460, 529, 586, 644, 805, 1058, 1172, 1465, 1610, 2051, 2116, 2645, 2930, 3220, 3703, 4102, 5290, 5860, 6739, 7406, 8204, 10255, 10580, 13478, 14812, 18515, 20510, 26956, 33695, 37030, 41020, 47173, 67390, 74060, 94346, 134780, 154997, 188692, 235865, 309994, 471730, 619988, 774985, 943460, 1084979, 1549970, 2169958, 3099940, 4339916, 5424895, 10849790, 21699580]

約数ペア:

[(1, 21699580), (2, 10849790), (4, 5424895), (5, 4339916), (7, 3099940), (10, 2169958), (14, 1549970), (20, 1084979), (23, 943460), (28, 774985), (35, 619988), (46, 471730), (70, 309994), (92, 235865), (115, 188692), (140, 154997), (161, 134780), (230, 94346), (293, 74060), (322, 67390), (460, 47173), (529, 41020), (586, 37030), (644, 33695), (805, 26956), (1058, 20510), (1172, 18515), (1465, 14812), (1610, 13478), (2051, 10580), (2116, 10255), (2645, 8204), (2930, 7406), (3220, 6739), (3703, 5860), (4102, 5290)]