18964715

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 29942784

約数和(自身を除く): 10978069

約数列:

[1, 5, 7, 11, 31, 35, 49, 55, 77, 155, 217, 227, 245, 341, 385, 539, 1085, 1135, 1519, 1589, 1705, 2387, 2497, 2695, 7037, 7595, 7945, 11123, 11935, 12485, 16709, 17479, 35185, 49259, 55615, 77407, 83545, 87395, 122353, 246295, 344813, 387035, 541849, 611765, 1724065, 2709245, 3792943, 18964715]

約数ペア:

[(1, 18964715), (5, 3792943), (7, 2709245), (11, 1724065), (31, 611765), (35, 541849), (49, 387035), (55, 344813), (77, 246295), (155, 122353), (217, 87395), (227, 83545), (245, 77407), (341, 55615), (385, 49259), (539, 35185), (1085, 17479), (1135, 16709), (1519, 12485), (1589, 11935), (1705, 11123), (2387, 7945), (2497, 7595), (2695, 7037)]