20900790

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{439}}^1$

素因数の和:498

約数の個数: 72

約数和(自身を含む): 56936880

約数和(自身を除く): 36036090

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 30, 45, 46, 69, 90, 115, 138, 207, 230, 345, 414, 439, 529, 690, 878, 1035, 1058, 1317, 1587, 2070, 2195, 2634, 2645, 3174, 3951, 4390, 4761, 5290, 6585, 7902, 7935, 9522, 10097, 13170, 15870, 19755, 20194, 23805, 30291, 39510, 47610, 50485, 60582, 90873, 100970, 151455, 181746, 232231, 302910, 454365, 464462, 696693, 908730, 1161155, 1393386, 2090079, 2322310, 3483465, 4180158, 6966930, 10450395, 20900790]

約数ペア:

[(1, 20900790), (2, 10450395), (3, 6966930), (5, 4180158), (6, 3483465), (9, 2322310), (10, 2090079), (15, 1393386), (18, 1161155), (23, 908730), (30, 696693), (45, 464462), (46, 454365), (69, 302910), (90, 232231), (115, 181746), (138, 151455), (207, 100970), (230, 90873), (345, 60582), (414, 50485), (439, 47610), (529, 39510), (690, 30291), (878, 23805), (1035, 20194), (1058, 19755), (1317, 15870), (1587, 13170), (2070, 10097), (2195, 9522), (2634, 7935), (2645, 7902), (3174, 6585), (3951, 5290), (4390, 4761)]