81220140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{653}}^1\times {\mathrm{691}}^1$

素因数の和:1359

約数の個数: 72

約数和(自身を含む): 247102128

約数和(自身を除く): 165881988

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 653, 691, 1306, 1382, 1959, 2073, 2612, 2764, 3265, 3455, 3918, 4146, 5877, 6219, 6530, 6910, 7836, 8292, 9795, 10365, 11754, 12438, 13060, 13820, 19590, 20730, 23508, 24876, 29385, 31095, 39180, 41460, 58770, 62190, 117540, 124380, 451223, 902446, 1353669, 1804892, 2256115, 2707338, 4061007, 4512230, 5414676, 6768345, 8122014, 9024460, 13536690, 16244028, 20305035, 27073380, 40610070, 81220140]

約数ペア:

[(1, 81220140), (2, 40610070), (3, 27073380), (4, 20305035), (5, 16244028), (6, 13536690), (9, 9024460), (10, 8122014), (12, 6768345), (15, 5414676), (18, 4512230), (20, 4061007), (30, 2707338), (36, 2256115), (45, 1804892), (60, 1353669), (90, 902446), (180, 451223), (653, 124380), (691, 117540), (1306, 62190), (1382, 58770), (1959, 41460), (2073, 39180), (2612, 31095), (2764, 29385), (3265, 24876), (3455, 23508), (3918, 20730), (4146, 19590), (5877, 13820), (6219, 13060), (6530, 12438), (6910, 11754), (7836, 10365), (8292, 9795)]