18982980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{647}}^1$

素因数の和:825

約数の個数: 72

約数和(自身を含む): 58024512

約数和(自身を除く): 39041532

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 163, 180, 326, 489, 647, 652, 815, 978, 1294, 1467, 1630, 1941, 1956, 2445, 2588, 2934, 3235, 3260, 3882, 4890, 5823, 5868, 6470, 7335, 7764, 9705, 9780, 11646, 12940, 14670, 19410, 23292, 29115, 29340, 38820, 58230, 105461, 116460, 210922, 316383, 421844, 527305, 632766, 949149, 1054610, 1265532, 1581915, 1898298, 2109220, 3163830, 3796596, 4745745, 6327660, 9491490, 18982980]

約数ペア:

[(1, 18982980), (2, 9491490), (3, 6327660), (4, 4745745), (5, 3796596), (6, 3163830), (9, 2109220), (10, 1898298), (12, 1581915), (15, 1265532), (18, 1054610), (20, 949149), (30, 632766), (36, 527305), (45, 421844), (60, 316383), (90, 210922), (163, 116460), (180, 105461), (326, 58230), (489, 38820), (647, 29340), (652, 29115), (815, 23292), (978, 19410), (1294, 14670), (1467, 12940), (1630, 11646), (1941, 9780), (1956, 9705), (2445, 7764), (2588, 7335), (2934, 6470), (3235, 5868), (3260, 5823), (3882, 4890)]