18721430

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2939}}^1$

素因数の和:2973

約数の個数: 48

約数和(自身を含む): 42230160

約数和(自身を除く): 23508730

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 49, 65, 70, 91, 98, 130, 182, 245, 455, 490, 637, 910, 1274, 2939, 3185, 5878, 6370, 14695, 20573, 29390, 38207, 41146, 76414, 102865, 144011, 191035, 205730, 267449, 288022, 382070, 534898, 720055, 1337245, 1440110, 1872143, 2674490, 3744286, 9360715, 18721430]

約数ペア:

[(1, 18721430), (2, 9360715), (5, 3744286), (7, 2674490), (10, 1872143), (13, 1440110), (14, 1337245), (26, 720055), (35, 534898), (49, 382070), (65, 288022), (70, 267449), (91, 205730), (98, 191035), (130, 144011), (182, 102865), (245, 76414), (455, 41146), (490, 38207), (637, 29390), (910, 20573), (1274, 14695), (2939, 6370), (3185, 5878)]