20195385

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{191}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19617735

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 53, 57, 95, 105, 133, 159, 191, 265, 285, 371, 399, 573, 665, 795, 955, 1007, 1113, 1337, 1855, 1995, 2865, 3021, 3629, 4011, 5035, 5565, 6685, 7049, 10123, 10887, 15105, 18145, 20055, 21147, 25403, 30369, 35245, 50615, 54435, 70861, 76209, 105735, 127015, 151845, 192337, 212583, 354305, 381045, 577011, 961685, 1062915, 1346359, 2885055, 4039077, 6731795, 20195385]

約数ペア:

[(1, 20195385), (3, 6731795), (5, 4039077), (7, 2885055), (15, 1346359), (19, 1062915), (21, 961685), (35, 577011), (53, 381045), (57, 354305), (95, 212583), (105, 192337), (133, 151845), (159, 127015), (191, 105735), (265, 76209), (285, 70861), (371, 54435), (399, 50615), (573, 35245), (665, 30369), (795, 25403), (955, 21147), (1007, 20055), (1113, 18145), (1337, 15105), (1855, 10887), (1995, 10123), (2865, 7049), (3021, 6685), (3629, 5565), (4011, 5035)]