18740540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1471}}^1$

素因数の和:1507

約数の個数: 72

約数和(自身を含む): 49335552

約数和(自身を除く): 30595012

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1471, 1820, 2548, 2942, 3185, 5884, 6370, 7355, 10297, 12740, 14710, 19123, 20594, 29420, 38246, 41188, 51485, 72079, 76492, 95615, 102970, 133861, 144158, 191230, 205940, 267722, 288316, 360395, 382460, 535444, 669305, 720790, 937027, 1338610, 1441580, 1874054, 2677220, 3748108, 4685135, 9370270, 18740540]

約数ペア:

[(1, 18740540), (2, 9370270), (4, 4685135), (5, 3748108), (7, 2677220), (10, 1874054), (13, 1441580), (14, 1338610), (20, 937027), (26, 720790), (28, 669305), (35, 535444), (49, 382460), (52, 360395), (65, 288316), (70, 267722), (91, 205940), (98, 191230), (130, 144158), (140, 133861), (182, 102970), (196, 95615), (245, 76492), (260, 72079), (364, 51485), (455, 41188), (490, 38246), (637, 29420), (910, 20594), (980, 19123), (1274, 14710), (1471, 12740), (1820, 10297), (2548, 7355), (2942, 6370), (3185, 5884)]