20778225

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{211}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 37539264

約数和(自身を除く): 16761039

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 101, 195, 211, 303, 325, 505, 633, 975, 1055, 1313, 1515, 2525, 2743, 3165, 3939, 5275, 6565, 7575, 8229, 13715, 15825, 19695, 21311, 32825, 41145, 63933, 68575, 98475, 106555, 205725, 277043, 319665, 532775, 831129, 1385215, 1598325, 4155645, 6926075, 20778225]

約数ペア:

[(1, 20778225), (3, 6926075), (5, 4155645), (13, 1598325), (15, 1385215), (25, 831129), (39, 532775), (65, 319665), (75, 277043), (101, 205725), (195, 106555), (211, 98475), (303, 68575), (325, 63933), (505, 41145), (633, 32825), (975, 21311), (1055, 19695), (1313, 15825), (1515, 13715), (2525, 8229), (2743, 7575), (3165, 6565), (3939, 5275)]