18408580

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{191}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 21588860

約数列:

[1, 2, 4, 5, 10, 20, 61, 79, 122, 158, 191, 244, 305, 316, 382, 395, 610, 764, 790, 955, 1220, 1580, 1910, 3820, 4819, 9638, 11651, 15089, 19276, 23302, 24095, 30178, 46604, 48190, 58255, 60356, 75445, 96380, 116510, 150890, 233020, 301780, 920429, 1840858, 3681716, 4602145, 9204290, 18408580]

約数ペア:

[(1, 18408580), (2, 9204290), (4, 4602145), (5, 3681716), (10, 1840858), (20, 920429), (61, 301780), (79, 233020), (122, 150890), (158, 116510), (191, 96380), (244, 75445), (305, 60356), (316, 58255), (382, 48190), (395, 46604), (610, 30178), (764, 24095), (790, 23302), (955, 19276), (1220, 15089), (1580, 11651), (1910, 9638), (3820, 4819)]