18940215

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{353}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 35836128

約数和(自身を除く): 16895913

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 73, 105, 147, 219, 245, 353, 365, 511, 735, 1059, 1095, 1533, 1765, 2471, 2555, 3577, 5295, 7413, 7665, 10731, 12355, 17297, 17885, 25769, 37065, 51891, 53655, 77307, 86485, 128845, 180383, 259455, 386535, 541149, 901915, 1262681, 2705745, 3788043, 6313405, 18940215]

約数ペア:

[(1, 18940215), (3, 6313405), (5, 3788043), (7, 2705745), (15, 1262681), (21, 901915), (35, 541149), (49, 386535), (73, 259455), (105, 180383), (147, 128845), (219, 86485), (245, 77307), (353, 53655), (365, 51891), (511, 37065), (735, 25769), (1059, 17885), (1095, 17297), (1533, 12355), (1765, 10731), (2471, 7665), (2555, 7413), (3577, 5295)]