20150840720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{198179}}^1$

素因数の和:198264

約数の個数: 80

約数和(自身を含む): 49541829120

約数和(自身を除く): 29390988400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 41, 62, 80, 82, 124, 155, 164, 205, 248, 310, 328, 410, 496, 620, 656, 820, 1240, 1271, 1640, 2480, 2542, 3280, 5084, 6355, 10168, 12710, 20336, 25420, 50840, 101680, 198179, 396358, 792716, 990895, 1585432, 1981790, 3170864, 3963580, 6143549, 7927160, 8125339, 12287098, 15854320, 16250678, 24574196, 30717745, 32501356, 40626695, 49148392, 61435490, 65002712, 81253390, 98296784, 122870980, 130005424, 162506780, 245741960, 251885509, 325013560, 491483920, 503771018, 650027120, 1007542036, 1259427545, 2015084072, 2518855090, 4030168144, 5037710180, 10075420360, 20150840720]

約数ペア:

[(1, 20150840720), (2, 10075420360), (4, 5037710180), (5, 4030168144), (8, 2518855090), (10, 2015084072), (16, 1259427545), (20, 1007542036), (31, 650027120), (40, 503771018), (41, 491483920), (62, 325013560), (80, 251885509), (82, 245741960), (124, 162506780), (155, 130005424), (164, 122870980), (205, 98296784), (248, 81253390), (310, 65002712), (328, 61435490), (410, 49148392), (496, 40626695), (620, 32501356), (656, 30717745), (820, 24574196), (1240, 16250678), (1271, 15854320), (1640, 12287098), (2480, 8125339), (2542, 7927160), (3280, 6143549), (5084, 3963580), (6355, 3170864), (10168, 1981790), (12710, 1585432), (20336, 990895), (25420, 792716), (50840, 396358), (101680, 198179)]