81431416

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{431}}^1$

素因数の和:580

約数の個数: 64

約数和(自身を含む): 177292800

約数和(自身を除く): 95861384

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 76, 88, 113, 152, 209, 226, 418, 431, 452, 836, 862, 904, 1243, 1672, 1724, 2147, 2486, 3448, 4294, 4741, 4972, 8189, 8588, 9482, 9944, 16378, 17176, 18964, 23617, 32756, 37928, 47234, 48703, 65512, 90079, 94468, 97406, 180158, 188936, 194812, 360316, 389624, 535733, 720632, 925357, 1071466, 1850714, 2142932, 3701428, 4285864, 7402856, 10178927, 20357854, 40715708, 81431416]

約数ペア:

[(1, 81431416), (2, 40715708), (4, 20357854), (8, 10178927), (11, 7402856), (19, 4285864), (22, 3701428), (38, 2142932), (44, 1850714), (76, 1071466), (88, 925357), (113, 720632), (152, 535733), (209, 389624), (226, 360316), (418, 194812), (431, 188936), (452, 180158), (836, 97406), (862, 94468), (904, 90079), (1243, 65512), (1672, 48703), (1724, 47234), (2147, 37928), (2486, 32756), (3448, 23617), (4294, 18964), (4741, 17176), (4972, 16378), (8189, 9944), (8588, 9482)]