81021420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:280

約数の個数: 144

約数和(自身を含む): 256733568

約数和(自身を除く): 175712148

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 47, 60, 61, 90, 94, 122, 141, 157, 180, 183, 188, 235, 244, 282, 305, 314, 366, 423, 470, 471, 549, 564, 610, 628, 705, 732, 785, 846, 915, 940, 942, 1098, 1220, 1410, 1413, 1570, 1692, 1830, 1884, 2115, 2196, 2355, 2745, 2820, 2826, 2867, 3140, 3660, 4230, 4710, 5490, 5652, 5734, 7065, 7379, 8460, 8601, 9420, 9577, 10980, 11468, 14130, 14335, 14758, 17202, 19154, 22137, 25803, 28260, 28670, 28731, 29516, 34404, 36895, 38308, 43005, 44274, 47885, 51606, 57340, 57462, 66411, 73790, 86010, 86193, 88548, 95770, 103212, 110685, 114924, 129015, 132822, 143655, 147580, 172020, 172386, 191540, 221370, 258030, 265644, 287310, 332055, 344772, 430965, 442740, 450119, 516060, 574620, 664110, 861930, 900238, 1328220, 1350357, 1723860, 1800476, 2250595, 2700714, 4051071, 4501190, 5401428, 6751785, 8102142, 9002380, 13503570, 16204284, 20255355, 27007140, 40510710, 81021420]

約数ペア:

[(1, 81021420), (2, 40510710), (3, 27007140), (4, 20255355), (5, 16204284), (6, 13503570), (9, 9002380), (10, 8102142), (12, 6751785), (15, 5401428), (18, 4501190), (20, 4051071), (30, 2700714), (36, 2250595), (45, 1800476), (47, 1723860), (60, 1350357), (61, 1328220), (90, 900238), (94, 861930), (122, 664110), (141, 574620), (157, 516060), (180, 450119), (183, 442740), (188, 430965), (235, 344772), (244, 332055), (282, 287310), (305, 265644), (314, 258030), (366, 221370), (423, 191540), (470, 172386), (471, 172020), (549, 147580), (564, 143655), (610, 132822), (628, 129015), (705, 114924), (732, 110685), (785, 103212), (846, 95770), (915, 88548), (940, 86193), (942, 86010), (1098, 73790), (1220, 66411), (1410, 57462), (1413, 57340), (1570, 51606), (1692, 47885), (1830, 44274), (1884, 43005), (2115, 38308), (2196, 36895), (2355, 34404), (2745, 29516), (2820, 28731), (2826, 28670), (2867, 28260), (3140, 25803), (3660, 22137), (4230, 19154), (4710, 17202), (5490, 14758), (5652, 14335), (5734, 14130), (7065, 11468), (7379, 10980), (8460, 9577), (8601, 9420)]