20121880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{233}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 48522240

約数和(自身を除く): 28400360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 127, 136, 170, 233, 254, 340, 466, 508, 635, 680, 932, 1016, 1165, 1270, 1864, 2159, 2330, 2540, 3961, 4318, 4660, 5080, 7922, 8636, 9320, 10795, 15844, 17272, 19805, 21590, 29591, 31688, 39610, 43180, 59182, 79220, 86360, 118364, 147955, 158440, 236728, 295910, 503047, 591820, 1006094, 1183640, 2012188, 2515235, 4024376, 5030470, 10060940, 20121880]

約数ペア:

[(1, 20121880), (2, 10060940), (4, 5030470), (5, 4024376), (8, 2515235), (10, 2012188), (17, 1183640), (20, 1006094), (34, 591820), (40, 503047), (68, 295910), (85, 236728), (127, 158440), (136, 147955), (170, 118364), (233, 86360), (254, 79220), (340, 59182), (466, 43180), (508, 39610), (635, 31688), (680, 29591), (932, 21590), (1016, 19805), (1165, 17272), (1270, 15844), (1864, 10795), (2159, 9320), (2330, 8636), (2540, 7922), (3961, 5080), (4318, 4660)]