81152420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^2$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 187434240

約数和(自身を除く): 106281820

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 62, 76, 83, 95, 124, 155, 166, 190, 310, 332, 380, 415, 589, 620, 830, 1178, 1577, 1660, 2356, 2573, 2945, 3154, 5146, 5890, 6308, 6889, 7885, 10292, 11780, 12865, 13778, 15770, 25730, 27556, 31540, 34445, 48887, 51460, 68890, 97774, 130891, 137780, 195548, 213559, 244435, 261782, 427118, 488870, 523564, 654455, 854236, 977740, 1067795, 1308910, 2135590, 2617820, 4057621, 4271180, 8115242, 16230484, 20288105, 40576210, 81152420]

約数ペア:

[(1, 81152420), (2, 40576210), (4, 20288105), (5, 16230484), (10, 8115242), (19, 4271180), (20, 4057621), (31, 2617820), (38, 2135590), (62, 1308910), (76, 1067795), (83, 977740), (95, 854236), (124, 654455), (155, 523564), (166, 488870), (190, 427118), (310, 261782), (332, 244435), (380, 213559), (415, 195548), (589, 137780), (620, 130891), (830, 97774), (1178, 68890), (1577, 51460), (1660, 48887), (2356, 34445), (2573, 31540), (2945, 27556), (3154, 25730), (5146, 15770), (5890, 13778), (6308, 12865), (6889, 11780), (7885, 10292)]