40778020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{739}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 89510400

約数和(自身を除く): 48732380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 89, 124, 155, 178, 310, 356, 445, 620, 739, 890, 1478, 1780, 2759, 2956, 3695, 5518, 7390, 11036, 13795, 14780, 22909, 27590, 45818, 55180, 65771, 91636, 114545, 131542, 229090, 263084, 328855, 458180, 657710, 1315420, 2038901, 4077802, 8155604, 10194505, 20389010, 40778020]

約数ペア:

[(1, 40778020), (2, 20389010), (4, 10194505), (5, 8155604), (10, 4077802), (20, 2038901), (31, 1315420), (62, 657710), (89, 458180), (124, 328855), (155, 263084), (178, 229090), (310, 131542), (356, 114545), (445, 91636), (620, 65771), (739, 55180), (890, 45818), (1478, 27590), (1780, 22909), (2759, 14780), (2956, 13795), (3695, 11036), (5518, 7390)]