20449415

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 31518720

約数和(自身を除く): 11069305

約数列:

[1, 5, 7, 19, 23, 35, 49, 95, 115, 133, 161, 191, 245, 437, 665, 805, 931, 955, 1127, 1337, 2185, 3059, 3629, 4393, 4655, 5635, 6685, 9359, 15295, 18145, 21413, 21965, 25403, 30751, 46795, 83467, 107065, 127015, 153755, 177821, 215257, 417335, 584269, 889105, 1076285, 2921345, 4089883, 20449415]

約数ペア:

[(1, 20449415), (5, 4089883), (7, 2921345), (19, 1076285), (23, 889105), (35, 584269), (49, 417335), (95, 215257), (115, 177821), (133, 153755), (161, 127015), (191, 107065), (245, 83467), (437, 46795), (665, 30751), (805, 25403), (931, 21965), (955, 21413), (1127, 18145), (1337, 15295), (2185, 9359), (3059, 6685), (3629, 5635), (4393, 4655)]