20855880

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:221

約数の個数: 160

約数和(自身を含む): 72266040

約数和(自身を除く): 51410160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 41, 45, 54, 60, 72, 81, 82, 90, 108, 120, 123, 135, 157, 162, 164, 180, 205, 216, 246, 270, 314, 324, 328, 360, 369, 405, 410, 471, 492, 540, 615, 628, 648, 738, 785, 810, 820, 942, 984, 1080, 1107, 1230, 1256, 1413, 1476, 1570, 1620, 1640, 1845, 1884, 2214, 2355, 2460, 2826, 2952, 3140, 3240, 3321, 3690, 3768, 4239, 4428, 4710, 4920, 5535, 5652, 6280, 6437, 6642, 7065, 7380, 8478, 8856, 9420, 11070, 11304, 12717, 12874, 13284, 14130, 14760, 16605, 16956, 18840, 19311, 21195, 22140, 25434, 25748, 26568, 28260, 32185, 33210, 33912, 38622, 42390, 44280, 50868, 51496, 56520, 57933, 63585, 64370, 66420, 77244, 84780, 96555, 101736, 115866, 127170, 128740, 132840, 154488, 169560, 173799, 193110, 231732, 254340, 257480, 289665, 347598, 386220, 463464, 508680, 521397, 579330, 695196, 772440, 868995, 1042794, 1158660, 1390392, 1737990, 2085588, 2317320, 2606985, 3475980, 4171176, 5213970, 6951960, 10427940, 20855880]

約数ペア:

[(1, 20855880), (2, 10427940), (3, 6951960), (4, 5213970), (5, 4171176), (6, 3475980), (8, 2606985), (9, 2317320), (10, 2085588), (12, 1737990), (15, 1390392), (18, 1158660), (20, 1042794), (24, 868995), (27, 772440), (30, 695196), (36, 579330), (40, 521397), (41, 508680), (45, 463464), (54, 386220), (60, 347598), (72, 289665), (81, 257480), (82, 254340), (90, 231732), (108, 193110), (120, 173799), (123, 169560), (135, 154488), (157, 132840), (162, 128740), (164, 127170), (180, 115866), (205, 101736), (216, 96555), (246, 84780), (270, 77244), (314, 66420), (324, 64370), (328, 63585), (360, 57933), (369, 56520), (405, 51496), (410, 50868), (471, 44280), (492, 42390), (540, 38622), (615, 33912), (628, 33210), (648, 32185), (738, 28260), (785, 26568), (810, 25748), (820, 25434), (942, 22140), (984, 21195), (1080, 19311), (1107, 18840), (1230, 16956), (1256, 16605), (1413, 14760), (1476, 14130), (1570, 13284), (1620, 12874), (1640, 12717), (1845, 11304), (1884, 11070), (2214, 9420), (2355, 8856), (2460, 8478), (2826, 7380), (2952, 7065), (3140, 6642), (3240, 6437), (3321, 6280), (3690, 5652), (3768, 5535), (4239, 4920), (4428, 4710)]