81264540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:368

約数の個数: 144

約数和(自身を含む): 267974784

約数和(自身を除く): 186710244

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 131, 140, 147, 196, 210, 211, 245, 262, 294, 393, 420, 422, 490, 524, 588, 633, 655, 735, 786, 844, 917, 980, 1055, 1266, 1310, 1470, 1477, 1572, 1834, 1965, 2110, 2532, 2620, 2751, 2940, 2954, 3165, 3668, 3930, 4220, 4431, 4585, 5502, 5908, 6330, 6419, 7385, 7860, 8862, 9170, 10339, 11004, 12660, 12838, 13755, 14770, 17724, 18340, 19257, 20678, 22155, 25676, 27510, 27641, 29540, 31017, 32095, 38514, 41356, 44310, 51695, 55020, 55282, 62034, 64190, 77028, 82923, 88620, 96285, 103390, 110564, 124068, 128380, 138205, 155085, 165846, 192570, 193487, 206780, 276410, 310170, 331692, 385140, 386974, 414615, 552820, 580461, 620340, 773948, 829230, 967435, 1160922, 1354409, 1658460, 1934870, 2321844, 2708818, 2902305, 3869740, 4063227, 5417636, 5804610, 6772045, 8126454, 11609220, 13544090, 16252908, 20316135, 27088180, 40632270, 81264540]

約数ペア:

[(1, 81264540), (2, 40632270), (3, 27088180), (4, 20316135), (5, 16252908), (6, 13544090), (7, 11609220), (10, 8126454), (12, 6772045), (14, 5804610), (15, 5417636), (20, 4063227), (21, 3869740), (28, 2902305), (30, 2708818), (35, 2321844), (42, 1934870), (49, 1658460), (60, 1354409), (70, 1160922), (84, 967435), (98, 829230), (105, 773948), (131, 620340), (140, 580461), (147, 552820), (196, 414615), (210, 386974), (211, 385140), (245, 331692), (262, 310170), (294, 276410), (393, 206780), (420, 193487), (422, 192570), (490, 165846), (524, 155085), (588, 138205), (633, 128380), (655, 124068), (735, 110564), (786, 103390), (844, 96285), (917, 88620), (980, 82923), (1055, 77028), (1266, 64190), (1310, 62034), (1470, 55282), (1477, 55020), (1572, 51695), (1834, 44310), (1965, 41356), (2110, 38514), (2532, 32095), (2620, 31017), (2751, 29540), (2940, 27641), (2954, 27510), (3165, 25676), (3668, 22155), (3930, 20678), (4220, 19257), (4431, 18340), (4585, 17724), (5502, 14770), (5908, 13755), (6330, 12838), (6419, 12660), (7385, 11004), (7860, 10339), (8862, 9170)]