20337980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:243

約数の個数: 96

約数和(自身を含む): 50803200

約数和(自身を除く): 30465220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 23, 26, 38, 46, 52, 65, 76, 92, 95, 115, 130, 179, 190, 230, 247, 260, 299, 358, 380, 437, 460, 494, 598, 716, 874, 895, 988, 1196, 1235, 1495, 1748, 1790, 2185, 2327, 2470, 2990, 3401, 3580, 4117, 4370, 4654, 4940, 5681, 5980, 6802, 8234, 8740, 9308, 11362, 11635, 13604, 16468, 17005, 20585, 22724, 23270, 28405, 34010, 41170, 44213, 46540, 53521, 56810, 68020, 78223, 82340, 88426, 107042, 113620, 156446, 176852, 214084, 221065, 267605, 312892, 391115, 442130, 535210, 782230, 884260, 1016899, 1070420, 1564460, 2033798, 4067596, 5084495, 10168990, 20337980]

約数ペア:

[(1, 20337980), (2, 10168990), (4, 5084495), (5, 4067596), (10, 2033798), (13, 1564460), (19, 1070420), (20, 1016899), (23, 884260), (26, 782230), (38, 535210), (46, 442130), (52, 391115), (65, 312892), (76, 267605), (92, 221065), (95, 214084), (115, 176852), (130, 156446), (179, 113620), (190, 107042), (230, 88426), (247, 82340), (260, 78223), (299, 68020), (358, 56810), (380, 53521), (437, 46540), (460, 44213), (494, 41170), (598, 34010), (716, 28405), (874, 23270), (895, 22724), (988, 20585), (1196, 17005), (1235, 16468), (1495, 13604), (1748, 11635), (1790, 11362), (2185, 9308), (2327, 8740), (2470, 8234), (2990, 6802), (3401, 5980), (3580, 5681), (4117, 4940), (4370, 4654)]