18008420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 39841200

約数和(自身を除く): 21832780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 61, 116, 122, 145, 244, 290, 305, 509, 580, 610, 1018, 1220, 1769, 2036, 2545, 3538, 5090, 7076, 8845, 10180, 14761, 17690, 29522, 31049, 35380, 59044, 62098, 73805, 124196, 147610, 155245, 295220, 310490, 620980, 900421, 1800842, 3601684, 4502105, 9004210, 18008420]

約数ペア:

[(1, 18008420), (2, 9004210), (4, 4502105), (5, 3601684), (10, 1800842), (20, 900421), (29, 620980), (58, 310490), (61, 295220), (116, 155245), (122, 147610), (145, 124196), (244, 73805), (290, 62098), (305, 59044), (509, 35380), (580, 31049), (610, 29522), (1018, 17690), (1220, 14761), (1769, 10180), (2036, 8845), (2545, 7076), (3538, 5090)]