19809460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{709}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 45803520

約数和(自身を除く): 25994060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 127, 220, 254, 508, 635, 709, 1270, 1397, 1418, 2540, 2794, 2836, 3545, 5588, 6985, 7090, 7799, 13970, 14180, 15598, 27940, 31196, 38995, 77990, 90043, 155980, 180086, 360172, 450215, 900430, 990473, 1800860, 1980946, 3961892, 4952365, 9904730, 19809460]

約数ペア:

[(1, 19809460), (2, 9904730), (4, 4952365), (5, 3961892), (10, 1980946), (11, 1800860), (20, 990473), (22, 900430), (44, 450215), (55, 360172), (110, 180086), (127, 155980), (220, 90043), (254, 77990), (508, 38995), (635, 31196), (709, 27940), (1270, 15598), (1397, 14180), (1418, 13970), (2540, 7799), (2794, 7090), (2836, 6985), (3545, 5588)]