18380775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{223}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 35108864

約数和(自身を除く): 16728089

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 157, 175, 223, 471, 525, 669, 785, 1099, 1115, 1561, 2355, 3297, 3345, 3925, 4683, 5495, 5575, 7805, 11775, 16485, 16725, 23415, 27475, 35011, 39025, 82425, 105033, 117075, 175055, 245077, 525165, 735231, 875275, 1225385, 2625825, 3676155, 6126925, 18380775]

約数ペア:

[(1, 18380775), (3, 6126925), (5, 3676155), (7, 2625825), (15, 1225385), (21, 875275), (25, 735231), (35, 525165), (75, 245077), (105, 175055), (157, 117075), (175, 105033), (223, 82425), (471, 39025), (525, 35011), (669, 27475), (785, 23415), (1099, 16725), (1115, 16485), (1561, 11775), (2355, 7805), (3297, 5575), (3345, 5495), (3925, 4683)]