81311940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:502

約数の個数: 144

約数和(自身を含む): 262669680

約数和(自身を除く): 181357740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 37, 45, 58, 60, 74, 87, 90, 111, 116, 145, 148, 174, 180, 185, 222, 261, 290, 333, 348, 370, 421, 435, 444, 522, 555, 580, 666, 740, 842, 870, 1044, 1073, 1110, 1263, 1305, 1332, 1665, 1684, 1740, 2105, 2146, 2220, 2526, 2610, 3219, 3330, 3789, 4210, 4292, 5052, 5220, 5365, 6315, 6438, 6660, 7578, 8420, 9657, 10730, 12209, 12630, 12876, 15156, 15577, 16095, 18945, 19314, 21460, 24418, 25260, 31154, 32190, 36627, 37890, 38628, 46731, 48285, 48836, 61045, 62308, 64380, 73254, 75780, 77885, 93462, 96570, 109881, 122090, 140193, 146508, 155770, 183135, 186924, 193140, 219762, 233655, 244180, 280386, 311540, 366270, 439524, 451733, 467310, 549405, 560772, 700965, 732540, 903466, 934620, 1098810, 1355199, 1401930, 1806932, 2197620, 2258665, 2710398, 2803860, 4065597, 4517330, 5420796, 6775995, 8131194, 9034660, 13551990, 16262388, 20327985, 27103980, 40655970, 81311940]

約数ペア:

[(1, 81311940), (2, 40655970), (3, 27103980), (4, 20327985), (5, 16262388), (6, 13551990), (9, 9034660), (10, 8131194), (12, 6775995), (15, 5420796), (18, 4517330), (20, 4065597), (29, 2803860), (30, 2710398), (36, 2258665), (37, 2197620), (45, 1806932), (58, 1401930), (60, 1355199), (74, 1098810), (87, 934620), (90, 903466), (111, 732540), (116, 700965), (145, 560772), (148, 549405), (174, 467310), (180, 451733), (185, 439524), (222, 366270), (261, 311540), (290, 280386), (333, 244180), (348, 233655), (370, 219762), (421, 193140), (435, 186924), (444, 183135), (522, 155770), (555, 146508), (580, 140193), (666, 122090), (740, 109881), (842, 96570), (870, 93462), (1044, 77885), (1073, 75780), (1110, 73254), (1263, 64380), (1305, 62308), (1332, 61045), (1665, 48836), (1684, 48285), (1740, 46731), (2105, 38628), (2146, 37890), (2220, 36627), (2526, 32190), (2610, 31154), (3219, 25260), (3330, 24418), (3789, 21460), (4210, 19314), (4292, 18945), (5052, 16095), (5220, 15577), (5365, 15156), (6315, 12876), (6438, 12630), (6660, 12209), (7578, 10730), (8420, 9657)]