81783940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{4909}}^1$

素因数の和:4949

約数の個数: 72

約数和(自身を含む): 211581720

約数和(自身を除く): 129797780

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1666, 2380, 3332, 4165, 4909, 8330, 9818, 16660, 19636, 24545, 34363, 49090, 68726, 83453, 98180, 137452, 166906, 171815, 240541, 333812, 343630, 417265, 481082, 584171, 687260, 834530, 962164, 1168342, 1202705, 1669060, 2336684, 2405410, 2920855, 4089197, 4810820, 5841710, 8178394, 11683420, 16356788, 20445985, 40891970, 81783940]

約数ペア:

[(1, 81783940), (2, 40891970), (4, 20445985), (5, 16356788), (7, 11683420), (10, 8178394), (14, 5841710), (17, 4810820), (20, 4089197), (28, 2920855), (34, 2405410), (35, 2336684), (49, 1669060), (68, 1202705), (70, 1168342), (85, 962164), (98, 834530), (119, 687260), (140, 584171), (170, 481082), (196, 417265), (238, 343630), (245, 333812), (340, 240541), (476, 171815), (490, 166906), (595, 137452), (833, 98180), (980, 83453), (1190, 68726), (1666, 49090), (2380, 34363), (3332, 24545), (4165, 19636), (4909, 16660), (8330, 9818)]