20281860

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1$

素因数の和:135

約数の個数: 144

約数和(自身を含む): 66890880

約数和(自身を除く): 46609020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 27, 30, 36, 45, 46, 54, 60, 69, 71, 90, 92, 108, 115, 135, 138, 142, 180, 207, 213, 230, 270, 276, 284, 345, 355, 414, 426, 460, 529, 540, 621, 639, 690, 710, 828, 852, 1035, 1058, 1065, 1242, 1278, 1380, 1420, 1587, 1633, 1917, 2070, 2116, 2130, 2484, 2556, 2645, 3105, 3174, 3195, 3266, 3834, 4140, 4260, 4761, 4899, 5290, 6210, 6348, 6390, 6532, 7668, 7935, 8165, 9522, 9585, 9798, 10580, 12420, 12780, 14283, 14697, 15870, 16330, 19044, 19170, 19596, 23805, 24495, 28566, 29394, 31740, 32660, 37559, 38340, 44091, 47610, 48990, 57132, 58788, 71415, 73485, 75118, 88182, 95220, 97980, 112677, 142830, 146970, 150236, 176364, 187795, 220455, 225354, 285660, 293940, 338031, 375590, 440910, 450708, 563385, 676062, 751180, 881820, 1014093, 1126770, 1352124, 1690155, 2028186, 2253540, 3380310, 4056372, 5070465, 6760620, 10140930, 20281860]

約数ペア:

[(1, 20281860), (2, 10140930), (3, 6760620), (4, 5070465), (5, 4056372), (6, 3380310), (9, 2253540), (10, 2028186), (12, 1690155), (15, 1352124), (18, 1126770), (20, 1014093), (23, 881820), (27, 751180), (30, 676062), (36, 563385), (45, 450708), (46, 440910), (54, 375590), (60, 338031), (69, 293940), (71, 285660), (90, 225354), (92, 220455), (108, 187795), (115, 176364), (135, 150236), (138, 146970), (142, 142830), (180, 112677), (207, 97980), (213, 95220), (230, 88182), (270, 75118), (276, 73485), (284, 71415), (345, 58788), (355, 57132), (414, 48990), (426, 47610), (460, 44091), (529, 38340), (540, 37559), (621, 32660), (639, 31740), (690, 29394), (710, 28566), (828, 24495), (852, 23805), (1035, 19596), (1058, 19170), (1065, 19044), (1242, 16330), (1278, 15870), (1380, 14697), (1420, 14283), (1587, 12780), (1633, 12420), (1917, 10580), (2070, 9798), (2116, 9585), (2130, 9522), (2484, 8165), (2556, 7935), (2645, 7668), (3105, 6532), (3174, 6390), (3195, 6348), (3266, 6210), (3834, 5290), (4140, 4899), (4260, 4761)]