18839920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{271}}^1$

素因数の和:374

約数の個数: 80

約数和(自身を含む): 48568320

約数和(自身を除く): 29728400

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 79, 80, 88, 110, 158, 176, 220, 271, 316, 395, 440, 542, 632, 790, 869, 880, 1084, 1264, 1355, 1580, 1738, 2168, 2710, 2981, 3160, 3476, 4336, 4345, 5420, 5962, 6320, 6952, 8690, 10840, 11924, 13904, 14905, 17380, 21409, 21680, 23848, 29810, 34760, 42818, 47696, 59620, 69520, 85636, 107045, 119240, 171272, 214090, 235499, 238480, 342544, 428180, 470998, 856360, 941996, 1177495, 1712720, 1883992, 2354990, 3767984, 4709980, 9419960, 18839920]

約数ペア:

[(1, 18839920), (2, 9419960), (4, 4709980), (5, 3767984), (8, 2354990), (10, 1883992), (11, 1712720), (16, 1177495), (20, 941996), (22, 856360), (40, 470998), (44, 428180), (55, 342544), (79, 238480), (80, 235499), (88, 214090), (110, 171272), (158, 119240), (176, 107045), (220, 85636), (271, 69520), (316, 59620), (395, 47696), (440, 42818), (542, 34760), (632, 29810), (790, 23848), (869, 21680), (880, 21409), (1084, 17380), (1264, 14905), (1355, 13904), (1580, 11924), (1738, 10840), (2168, 8690), (2710, 6952), (2981, 6320), (3160, 5962), (3476, 5420), (4336, 4345)]