19905120

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{601}}^1$

素因数の和:645

約数の個数: 144

約数和(自身を含む): 70997472

約数和(自身を除く): 51092352

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 96, 115, 120, 138, 144, 160, 180, 184, 207, 230, 240, 276, 288, 345, 360, 368, 414, 460, 480, 552, 601, 690, 720, 736, 828, 920, 1035, 1104, 1202, 1380, 1440, 1656, 1803, 1840, 2070, 2208, 2404, 2760, 3005, 3312, 3606, 3680, 4140, 4808, 5409, 5520, 6010, 6624, 7212, 8280, 9015, 9616, 10818, 11040, 12020, 13823, 14424, 16560, 18030, 19232, 21636, 24040, 27045, 27646, 28848, 33120, 36060, 41469, 43272, 48080, 54090, 55292, 57696, 69115, 72120, 82938, 86544, 96160, 108180, 110584, 124407, 138230, 144240, 165876, 173088, 207345, 216360, 221168, 248814, 276460, 288480, 331752, 414690, 432720, 442336, 497628, 552920, 622035, 663504, 829380, 865440, 995256, 1105840, 1244070, 1327008, 1658760, 1990512, 2211680, 2488140, 3317520, 3981024, 4976280, 6635040, 9952560, 19905120]

約数ペア:

[(1, 19905120), (2, 9952560), (3, 6635040), (4, 4976280), (5, 3981024), (6, 3317520), (8, 2488140), (9, 2211680), (10, 1990512), (12, 1658760), (15, 1327008), (16, 1244070), (18, 1105840), (20, 995256), (23, 865440), (24, 829380), (30, 663504), (32, 622035), (36, 552920), (40, 497628), (45, 442336), (46, 432720), (48, 414690), (60, 331752), (69, 288480), (72, 276460), (80, 248814), (90, 221168), (92, 216360), (96, 207345), (115, 173088), (120, 165876), (138, 144240), (144, 138230), (160, 124407), (180, 110584), (184, 108180), (207, 96160), (230, 86544), (240, 82938), (276, 72120), (288, 69115), (345, 57696), (360, 55292), (368, 54090), (414, 48080), (460, 43272), (480, 41469), (552, 36060), (601, 33120), (690, 28848), (720, 27646), (736, 27045), (828, 24040), (920, 21636), (1035, 19232), (1104, 18030), (1202, 16560), (1380, 14424), (1440, 13823), (1656, 12020), (1803, 11040), (1840, 10818), (2070, 9616), (2208, 9015), (2404, 8280), (2760, 7212), (3005, 6624), (3312, 6010), (3606, 5520), (3680, 5409), (4140, 4808)]