20718860

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{617}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 46097856

約数和(自身を除く): 25378996

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 73, 92, 115, 146, 230, 292, 365, 460, 617, 730, 1234, 1460, 1679, 2468, 3085, 3358, 6170, 6716, 8395, 12340, 14191, 16790, 28382, 33580, 45041, 56764, 70955, 90082, 141910, 180164, 225205, 283820, 450410, 900820, 1035943, 2071886, 4143772, 5179715, 10359430, 20718860]

約数ペア:

[(1, 20718860), (2, 10359430), (4, 5179715), (5, 4143772), (10, 2071886), (20, 1035943), (23, 900820), (46, 450410), (73, 283820), (92, 225205), (115, 180164), (146, 141910), (230, 90082), (292, 70955), (365, 56764), (460, 45041), (617, 33580), (730, 28382), (1234, 16790), (1460, 14191), (1679, 12340), (2468, 8395), (3085, 6716), (3358, 6170)]