81123420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{673}}^1$

素因数の和:740

約数の個数: 144

約数和(自身を含む): 271077408

約数和(自身を除く): 189953988

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 41, 42, 49, 60, 70, 82, 84, 98, 105, 123, 140, 147, 164, 196, 205, 210, 245, 246, 287, 294, 410, 420, 490, 492, 574, 588, 615, 673, 735, 820, 861, 980, 1148, 1230, 1346, 1435, 1470, 1722, 2009, 2019, 2460, 2692, 2870, 2940, 3365, 3444, 4018, 4038, 4305, 4711, 5740, 6027, 6730, 8036, 8076, 8610, 9422, 10045, 10095, 12054, 13460, 14133, 17220, 18844, 20090, 20190, 23555, 24108, 27593, 28266, 30135, 32977, 40180, 40380, 47110, 55186, 56532, 60270, 65954, 70665, 82779, 94220, 98931, 110372, 120540, 131908, 137965, 141330, 164885, 165558, 193151, 197862, 275930, 282660, 329770, 331116, 386302, 395724, 413895, 494655, 551860, 579453, 659540, 772604, 827790, 965755, 989310, 1158906, 1352057, 1655580, 1931510, 1978620, 2317812, 2704114, 2897265, 3863020, 4056171, 5408228, 5794530, 6760285, 8112342, 11589060, 13520570, 16224684, 20280855, 27041140, 40561710, 81123420]

約数ペア:

[(1, 81123420), (2, 40561710), (3, 27041140), (4, 20280855), (5, 16224684), (6, 13520570), (7, 11589060), (10, 8112342), (12, 6760285), (14, 5794530), (15, 5408228), (20, 4056171), (21, 3863020), (28, 2897265), (30, 2704114), (35, 2317812), (41, 1978620), (42, 1931510), (49, 1655580), (60, 1352057), (70, 1158906), (82, 989310), (84, 965755), (98, 827790), (105, 772604), (123, 659540), (140, 579453), (147, 551860), (164, 494655), (196, 413895), (205, 395724), (210, 386302), (245, 331116), (246, 329770), (287, 282660), (294, 275930), (410, 197862), (420, 193151), (490, 165558), (492, 164885), (574, 141330), (588, 137965), (615, 131908), (673, 120540), (735, 110372), (820, 98931), (861, 94220), (980, 82779), (1148, 70665), (1230, 65954), (1346, 60270), (1435, 56532), (1470, 55186), (1722, 47110), (2009, 40380), (2019, 40180), (2460, 32977), (2692, 30135), (2870, 28266), (2940, 27593), (3365, 24108), (3444, 23555), (4018, 20190), (4038, 20090), (4305, 18844), (4711, 17220), (5740, 14133), (6027, 13460), (6730, 12054), (8036, 10095), (8076, 10045), (8610, 9422)]