20881440

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{853}}^1$

素因数の和:891

約数の個数: 144

約数和(自身を含む): 75538008

約数和(自身を除く): 54656568

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 32, 34, 36, 40, 45, 48, 51, 60, 68, 72, 80, 85, 90, 96, 102, 120, 136, 144, 153, 160, 170, 180, 204, 240, 255, 272, 288, 306, 340, 360, 408, 480, 510, 544, 612, 680, 720, 765, 816, 853, 1020, 1224, 1360, 1440, 1530, 1632, 1706, 2040, 2448, 2559, 2720, 3060, 3412, 4080, 4265, 4896, 5118, 6120, 6824, 7677, 8160, 8530, 10236, 12240, 12795, 13648, 14501, 15354, 17060, 20472, 24480, 25590, 27296, 29002, 30708, 34120, 38385, 40944, 43503, 51180, 58004, 61416, 68240, 72505, 76770, 81888, 87006, 102360, 116008, 122832, 130509, 136480, 145010, 153540, 174012, 204720, 217515, 232016, 245664, 261018, 290020, 307080, 348024, 409440, 435030, 464032, 522036, 580040, 614160, 652545, 696048, 870060, 1044072, 1160080, 1228320, 1305090, 1392096, 1740120, 2088144, 2320160, 2610180, 3480240, 4176288, 5220360, 6960480, 10440720, 20881440]

約数ペア:

[(1, 20881440), (2, 10440720), (3, 6960480), (4, 5220360), (5, 4176288), (6, 3480240), (8, 2610180), (9, 2320160), (10, 2088144), (12, 1740120), (15, 1392096), (16, 1305090), (17, 1228320), (18, 1160080), (20, 1044072), (24, 870060), (30, 696048), (32, 652545), (34, 614160), (36, 580040), (40, 522036), (45, 464032), (48, 435030), (51, 409440), (60, 348024), (68, 307080), (72, 290020), (80, 261018), (85, 245664), (90, 232016), (96, 217515), (102, 204720), (120, 174012), (136, 153540), (144, 145010), (153, 136480), (160, 130509), (170, 122832), (180, 116008), (204, 102360), (240, 87006), (255, 81888), (272, 76770), (288, 72505), (306, 68240), (340, 61416), (360, 58004), (408, 51180), (480, 43503), (510, 40944), (544, 38385), (612, 34120), (680, 30708), (720, 29002), (765, 27296), (816, 25590), (853, 24480), (1020, 20472), (1224, 17060), (1360, 15354), (1440, 14501), (1530, 13648), (1632, 12795), (1706, 12240), (2040, 10236), (2448, 8530), (2559, 8160), (2720, 7677), (3060, 6824), (3412, 6120), (4080, 5118), (4265, 4896)]