20189780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:169

約数の個数: 96

約数和(自身を含む): 49580160

約数和(自身を除く): 29390380

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 61, 65, 67, 76, 95, 122, 130, 134, 190, 244, 247, 260, 268, 305, 335, 380, 494, 610, 670, 793, 871, 988, 1159, 1220, 1235, 1273, 1340, 1586, 1742, 2318, 2470, 2546, 3172, 3484, 3965, 4087, 4355, 4636, 4940, 5092, 5795, 6365, 7930, 8174, 8710, 11590, 12730, 15067, 15860, 16348, 16549, 17420, 20435, 23180, 25460, 30134, 33098, 40870, 53131, 60268, 66196, 75335, 77653, 81740, 82745, 106262, 150670, 155306, 165490, 212524, 265655, 301340, 310612, 330980, 388265, 531310, 776530, 1009489, 1062620, 1553060, 2018978, 4037956, 5047445, 10094890, 20189780]

約数ペア:

[(1, 20189780), (2, 10094890), (4, 5047445), (5, 4037956), (10, 2018978), (13, 1553060), (19, 1062620), (20, 1009489), (26, 776530), (38, 531310), (52, 388265), (61, 330980), (65, 310612), (67, 301340), (76, 265655), (95, 212524), (122, 165490), (130, 155306), (134, 150670), (190, 106262), (244, 82745), (247, 81740), (260, 77653), (268, 75335), (305, 66196), (335, 60268), (380, 53131), (494, 40870), (610, 33098), (670, 30134), (793, 25460), (871, 23180), (988, 20435), (1159, 17420), (1220, 16549), (1235, 16348), (1273, 15860), (1340, 15067), (1586, 12730), (1742, 11590), (2318, 8710), (2470, 8174), (2546, 7930), (3172, 6365), (3484, 5795), (3965, 5092), (4087, 4940), (4355, 4636)]