20127560

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 47072880

約数和(自身を除く): 26945320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 73, 113, 122, 146, 226, 244, 292, 305, 365, 452, 488, 565, 584, 610, 730, 904, 1130, 1220, 1460, 2260, 2440, 2920, 4453, 4520, 6893, 8249, 8906, 13786, 16498, 17812, 22265, 27572, 32996, 34465, 35624, 41245, 44530, 55144, 65992, 68930, 82490, 89060, 137860, 164980, 178120, 275720, 329960, 503189, 1006378, 2012756, 2515945, 4025512, 5031890, 10063780, 20127560]

約数ペア:

[(1, 20127560), (2, 10063780), (4, 5031890), (5, 4025512), (8, 2515945), (10, 2012756), (20, 1006378), (40, 503189), (61, 329960), (73, 275720), (113, 178120), (122, 164980), (146, 137860), (226, 89060), (244, 82490), (292, 68930), (305, 65992), (365, 55144), (452, 44530), (488, 41245), (565, 35624), (584, 34465), (610, 32996), (730, 27572), (904, 22265), (1130, 17812), (1220, 16498), (1460, 13786), (2260, 8906), (2440, 8249), (2920, 6893), (4453, 4520)]