21438540

素因数分解:

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

素因数の和:121

約数の個数: 144

約数和(自身を含む): 70912800

約数和(自身を除く): 49474260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 29, 30, 36, 37, 45, 54, 58, 60, 74, 87, 90, 108, 111, 116, 135, 145, 148, 174, 180, 185, 222, 261, 270, 290, 333, 348, 370, 435, 444, 522, 540, 555, 580, 666, 740, 783, 870, 999, 1044, 1073, 1110, 1305, 1332, 1369, 1566, 1665, 1740, 1998, 2146, 2220, 2610, 2738, 3132, 3219, 3330, 3915, 3996, 4107, 4292, 4995, 5220, 5365, 5476, 6438, 6660, 6845, 7830, 8214, 9657, 9990, 10730, 12321, 12876, 13690, 15660, 16095, 16428, 19314, 19980, 20535, 21460, 24642, 27380, 28971, 32190, 36963, 38628, 39701, 41070, 48285, 49284, 57942, 61605, 64380, 73926, 79402, 82140, 96570, 115884, 119103, 123210, 144855, 147852, 158804, 184815, 193140, 198505, 238206, 246420, 289710, 357309, 369630, 397010, 476412, 579420, 595515, 714618, 739260, 794020, 1071927, 1191030, 1429236, 1786545, 2143854, 2382060, 3573090, 4287708, 5359635, 7146180, 10719270, 21438540]

約数ペア:

[(1, 21438540), (2, 10719270), (3, 7146180), (4, 5359635), (5, 4287708), (6, 3573090), (9, 2382060), (10, 2143854), (12, 1786545), (15, 1429236), (18, 1191030), (20, 1071927), (27, 794020), (29, 739260), (30, 714618), (36, 595515), (37, 579420), (45, 476412), (54, 397010), (58, 369630), (60, 357309), (74, 289710), (87, 246420), (90, 238206), (108, 198505), (111, 193140), (116, 184815), (135, 158804), (145, 147852), (148, 144855), (174, 123210), (180, 119103), (185, 115884), (222, 96570), (261, 82140), (270, 79402), (290, 73926), (333, 64380), (348, 61605), (370, 57942), (435, 49284), (444, 48285), (522, 41070), (540, 39701), (555, 38628), (580, 36963), (666, 32190), (740, 28971), (783, 27380), (870, 24642), (999, 21460), (1044, 20535), (1073, 19980), (1110, 19314), (1305, 16428), (1332, 16095), (1369, 15660), (1566, 13690), (1665, 12876), (1740, 12321), (1998, 10730), (2146, 9990), (2220, 9657), (2610, 8214), (2738, 7830), (3132, 6845), (3219, 6660), (3330, 6438), (3915, 5476), (3996, 5365), (4107, 5220), (4292, 4995)]