1990820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:85

約数の個数: 72

約数和(自身を含む): 4919040

約数和(自身を除く): 2928220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 31, 38, 52, 62, 65, 76, 95, 124, 130, 155, 169, 190, 247, 260, 310, 338, 380, 403, 494, 589, 620, 676, 806, 845, 988, 1178, 1235, 1612, 1690, 2015, 2356, 2470, 2945, 3211, 3380, 4030, 4940, 5239, 5890, 6422, 7657, 8060, 10478, 11780, 12844, 15314, 16055, 20956, 26195, 30628, 32110, 38285, 52390, 64220, 76570, 99541, 104780, 153140, 199082, 398164, 497705, 995410, 1990820]

約数ペア:

[(1, 1990820), (2, 995410), (4, 497705), (5, 398164), (10, 199082), (13, 153140), (19, 104780), (20, 99541), (26, 76570), (31, 64220), (38, 52390), (52, 38285), (62, 32110), (65, 30628), (76, 26195), (95, 20956), (124, 16055), (130, 15314), (155, 12844), (169, 11780), (190, 10478), (247, 8060), (260, 7657), (310, 6422), (338, 5890), (380, 5239), (403, 4940), (494, 4030), (589, 3380), (620, 3211), (676, 2945), (806, 2470), (845, 2356), (988, 2015), (1178, 1690), (1235, 1612)]