21392955

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{191}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 18143685

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 131, 171, 191, 285, 393, 573, 655, 855, 955, 1179, 1719, 1965, 2489, 2865, 3629, 5895, 7467, 8595, 10887, 12445, 18145, 22401, 25021, 32661, 37335, 54435, 75063, 112005, 125105, 163305, 225189, 375315, 475399, 1125945, 1426197, 2376995, 4278591, 7130985, 21392955]

約数ペア:

[(1, 21392955), (3, 7130985), (5, 4278591), (9, 2376995), (15, 1426197), (19, 1125945), (45, 475399), (57, 375315), (95, 225189), (131, 163305), (171, 125105), (191, 112005), (285, 75063), (393, 54435), (573, 37335), (655, 32661), (855, 25021), (955, 22401), (1179, 18145), (1719, 12445), (1965, 10887), (2489, 8595), (2865, 7467), (3629, 5895)]