21994160

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4507}}^1$

素因数の和:4581

約数の個数: 40

約数和(自身を含む): 51986256

約数和(自身を除く): 29992096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4507, 4880, 9014, 18028, 22535, 36056, 45070, 72112, 90140, 180280, 274927, 360560, 549854, 1099708, 1374635, 2199416, 2749270, 4398832, 5498540, 10997080, 21994160]

約数ペア:

[(1, 21994160), (2, 10997080), (4, 5498540), (5, 4398832), (8, 2749270), (10, 2199416), (16, 1374635), (20, 1099708), (40, 549854), (61, 360560), (80, 274927), (122, 180280), (244, 90140), (305, 72112), (488, 45070), (610, 36056), (976, 22535), (1220, 18028), (2440, 9014), (4507, 4880)]