291211520

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1$

素因数の和:272

約数の個数: 144

約数和(自身を含む): 741726720

約数和(自身を除く): 450515200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 41, 62, 64, 80, 82, 124, 128, 155, 160, 164, 179, 205, 248, 256, 310, 320, 328, 358, 410, 496, 620, 640, 656, 716, 820, 895, 992, 1240, 1271, 1280, 1312, 1432, 1640, 1790, 1984, 2480, 2542, 2624, 2864, 3280, 3580, 3968, 4960, 5084, 5248, 5549, 5728, 6355, 6560, 7160, 7339, 7936, 9920, 10168, 10496, 11098, 11456, 12710, 13120, 14320, 14678, 19840, 20336, 22196, 22912, 25420, 26240, 27745, 28640, 29356, 36695, 39680, 40672, 44392, 45824, 50840, 52480, 55490, 57280, 58712, 73390, 81344, 88784, 101680, 110980, 114560, 117424, 146780, 162688, 177568, 203360, 221960, 227509, 229120, 234848, 293560, 325376, 355136, 406720, 443920, 455018, 469696, 587120, 710272, 813440, 887840, 910036, 939392, 1137545, 1174240, 1420544, 1626880, 1775680, 1820072, 1878784, 2275090, 2348480, 3551360, 3640144, 4550180, 4696960, 7102720, 7280288, 9100360, 9393920, 14560576, 18200720, 29121152, 36401440, 58242304, 72802880, 145605760, 291211520]

約数ペア:

[(1, 291211520), (2, 145605760), (4, 72802880), (5, 58242304), (8, 36401440), (10, 29121152), (16, 18200720), (20, 14560576), (31, 9393920), (32, 9100360), (40, 7280288), (41, 7102720), (62, 4696960), (64, 4550180), (80, 3640144), (82, 3551360), (124, 2348480), (128, 2275090), (155, 1878784), (160, 1820072), (164, 1775680), (179, 1626880), (205, 1420544), (248, 1174240), (256, 1137545), (310, 939392), (320, 910036), (328, 887840), (358, 813440), (410, 710272), (496, 587120), (620, 469696), (640, 455018), (656, 443920), (716, 406720), (820, 355136), (895, 325376), (992, 293560), (1240, 234848), (1271, 229120), (1280, 227509), (1312, 221960), (1432, 203360), (1640, 177568), (1790, 162688), (1984, 146780), (2480, 117424), (2542, 114560), (2624, 110980), (2864, 101680), (3280, 88784), (3580, 81344), (3968, 73390), (4960, 58712), (5084, 57280), (5248, 55490), (5549, 52480), (5728, 50840), (6355, 45824), (6560, 44392), (7160, 40672), (7339, 39680), (7936, 36695), (9920, 29356), (10168, 28640), (10496, 27745), (11098, 26240), (11456, 25420), (12710, 22912), (13120, 22196), (14320, 20336), (14678, 19840)]