19996890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{397}}^1$

素因数の和:503

約数の個数: 64

約数和(自身を含む): 50893056

約数和(自身を除く): 30896166

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 73, 115, 138, 146, 219, 230, 345, 365, 397, 438, 690, 730, 794, 1095, 1191, 1679, 1985, 2190, 2382, 3358, 3970, 5037, 5955, 8395, 9131, 10074, 11910, 16790, 18262, 25185, 27393, 28981, 45655, 50370, 54786, 57962, 86943, 91310, 136965, 144905, 173886, 273930, 289810, 434715, 666563, 869430, 1333126, 1999689, 3332815, 3999378, 6665630, 9998445, 19996890]

約数ペア:

[(1, 19996890), (2, 9998445), (3, 6665630), (5, 3999378), (6, 3332815), (10, 1999689), (15, 1333126), (23, 869430), (30, 666563), (46, 434715), (69, 289810), (73, 273930), (115, 173886), (138, 144905), (146, 136965), (219, 91310), (230, 86943), (345, 57962), (365, 54786), (397, 50370), (438, 45655), (690, 28981), (730, 27393), (794, 25185), (1095, 18262), (1191, 16790), (1679, 11910), (1985, 10074), (2190, 9131), (2382, 8395), (3358, 5955), (3970, 5037)]