20565220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:245

約数の個数: 96

約数和(自身を含む): 51367680

約数和(自身を除く): 30802460

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 23, 26, 38, 46, 52, 65, 76, 92, 95, 115, 130, 181, 190, 230, 247, 260, 299, 362, 380, 437, 460, 494, 598, 724, 874, 905, 988, 1196, 1235, 1495, 1748, 1810, 2185, 2353, 2470, 2990, 3439, 3620, 4163, 4370, 4706, 4940, 5681, 5980, 6878, 8326, 8740, 9412, 11362, 11765, 13756, 16652, 17195, 20815, 22724, 23530, 28405, 34390, 41630, 44707, 47060, 54119, 56810, 68780, 79097, 83260, 89414, 108238, 113620, 158194, 178828, 216476, 223535, 270595, 316388, 395485, 447070, 541190, 790970, 894140, 1028261, 1082380, 1581940, 2056522, 4113044, 5141305, 10282610, 20565220]

約数ペア:

[(1, 20565220), (2, 10282610), (4, 5141305), (5, 4113044), (10, 2056522), (13, 1581940), (19, 1082380), (20, 1028261), (23, 894140), (26, 790970), (38, 541190), (46, 447070), (52, 395485), (65, 316388), (76, 270595), (92, 223535), (95, 216476), (115, 178828), (130, 158194), (181, 113620), (190, 108238), (230, 89414), (247, 83260), (260, 79097), (299, 68780), (362, 56810), (380, 54119), (437, 47060), (460, 44707), (494, 41630), (598, 34390), (724, 28405), (874, 23530), (905, 22724), (988, 20815), (1196, 17195), (1235, 16652), (1495, 13756), (1748, 11765), (1810, 11362), (2185, 9412), (2353, 8740), (2470, 8326), (2990, 6878), (3439, 5980), (3620, 5681), (4163, 4940), (4370, 4706)]