20505888650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{122753}}^1$

素因数の和:123035

約数の個数: 48

約数和(自身を含む): 41235032664

約数和(自身を除く): 20729144014

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 257, 325, 514, 650, 1285, 2570, 3341, 6425, 6682, 12850, 16705, 33410, 83525, 122753, 167050, 245506, 613765, 1227530, 1595789, 3068825, 3191578, 6137650, 7978945, 15957890, 31547521, 39894725, 63095042, 79789450, 157737605, 315475210, 410117773, 788688025, 820235546, 1577376050, 2050588865, 4101177730, 10252944325, 20505888650]

約数ペア:

[(1, 20505888650), (2, 10252944325), (5, 4101177730), (10, 2050588865), (13, 1577376050), (25, 820235546), (26, 788688025), (50, 410117773), (65, 315475210), (130, 157737605), (257, 79789450), (325, 63095042), (514, 39894725), (650, 31547521), (1285, 15957890), (2570, 7978945), (3341, 6137650), (6425, 3191578), (6682, 3068825), (12850, 1595789), (16705, 1227530), (33410, 613765), (83525, 245506), (122753, 167050)]