21128220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1097}}^1$

素因数の和:1219

約数の個数: 72

約数和(自身を含む): 64746864

約数和(自身を除く): 43618644

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 107, 180, 214, 321, 428, 535, 642, 963, 1070, 1097, 1284, 1605, 1926, 2140, 2194, 3210, 3291, 3852, 4388, 4815, 5485, 6420, 6582, 9630, 9873, 10970, 13164, 16455, 19260, 19746, 21940, 32910, 39492, 49365, 65820, 98730, 117379, 197460, 234758, 352137, 469516, 586895, 704274, 1056411, 1173790, 1408548, 1760685, 2112822, 2347580, 3521370, 4225644, 5282055, 7042740, 10564110, 21128220]

約数ペア:

[(1, 21128220), (2, 10564110), (3, 7042740), (4, 5282055), (5, 4225644), (6, 3521370), (9, 2347580), (10, 2112822), (12, 1760685), (15, 1408548), (18, 1173790), (20, 1056411), (30, 704274), (36, 586895), (45, 469516), (60, 352137), (90, 234758), (107, 197460), (180, 117379), (214, 98730), (321, 65820), (428, 49365), (535, 39492), (642, 32910), (963, 21940), (1070, 19746), (1097, 19260), (1284, 16455), (1605, 13164), (1926, 10970), (2140, 9873), (2194, 9630), (3210, 6582), (3291, 6420), (3852, 5485), (4388, 4815)]