257089820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{191}}^1$

素因数の和:411

約数の個数: 96

約数和(自身を含む): 606928896

約数和(自身を除く): 349839076

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 167, 191, 260, 310, 334, 382, 403, 620, 668, 764, 806, 835, 955, 1612, 1670, 1910, 2015, 2171, 2483, 3340, 3820, 4030, 4342, 4966, 5177, 5921, 8060, 8684, 9932, 10354, 10855, 11842, 12415, 20708, 21710, 23684, 24830, 25885, 29605, 31897, 43420, 49660, 51770, 59210, 63794, 67301, 76973, 103540, 118420, 127588, 134602, 153946, 159485, 269204, 307892, 318970, 336505, 384865, 414661, 637940, 673010, 769730, 829322, 988807, 1346020, 1539460, 1658644, 1977614, 2073305, 3955228, 4146610, 4944035, 8293220, 9888070, 12854491, 19776140, 25708982, 51417964, 64272455, 128544910, 257089820]

約数ペア:

[(1, 257089820), (2, 128544910), (4, 64272455), (5, 51417964), (10, 25708982), (13, 19776140), (20, 12854491), (26, 9888070), (31, 8293220), (52, 4944035), (62, 4146610), (65, 3955228), (124, 2073305), (130, 1977614), (155, 1658644), (167, 1539460), (191, 1346020), (260, 988807), (310, 829322), (334, 769730), (382, 673010), (403, 637940), (620, 414661), (668, 384865), (764, 336505), (806, 318970), (835, 307892), (955, 269204), (1612, 159485), (1670, 153946), (1910, 134602), (2015, 127588), (2171, 118420), (2483, 103540), (3340, 76973), (3820, 67301), (4030, 63794), (4342, 59210), (4966, 51770), (5177, 49660), (5921, 43420), (8060, 31897), (8684, 29605), (9932, 25885), (10354, 24830), (10855, 23684), (11842, 21710), (12415, 20708)]