21478210

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:283

約数の個数: 48

約数和(自身を含む): 42690240

約数和(自身を除く): 21212030

約数列:

[1, 2, 5, 10, 13, 26, 65, 71, 130, 142, 169, 179, 338, 355, 358, 710, 845, 895, 923, 1690, 1790, 1846, 2327, 4615, 4654, 9230, 11635, 11999, 12709, 23270, 23998, 25418, 30251, 59995, 60502, 63545, 119990, 127090, 151255, 165217, 302510, 330434, 826085, 1652170, 2147821, 4295642, 10739105, 21478210]

約数ペア:

[(1, 21478210), (2, 10739105), (5, 4295642), (10, 2147821), (13, 1652170), (26, 826085), (65, 330434), (71, 302510), (130, 165217), (142, 151255), (169, 127090), (179, 119990), (338, 63545), (355, 60502), (358, 59995), (710, 30251), (845, 25418), (895, 23998), (923, 23270), (1690, 12709), (1790, 11999), (1846, 11635), (2327, 9230), (4615, 4654)]