20697040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2843}}^1$

素因数の和:2876

約数の個数: 80

約数和(自身を含む): 59246208

約数和(自身を除く): 38549168

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2843, 3640, 5686, 7280, 11372, 14215, 19901, 22744, 28430, 36959, 39802, 45488, 56860, 73918, 79604, 99505, 113720, 147836, 159208, 184795, 199010, 227440, 258713, 295672, 318416, 369590, 398020, 517426, 591344, 739180, 796040, 1034852, 1293565, 1478360, 1592080, 2069704, 2587130, 2956720, 4139408, 5174260, 10348520, 20697040]

約数ペア:

[(1, 20697040), (2, 10348520), (4, 5174260), (5, 4139408), (7, 2956720), (8, 2587130), (10, 2069704), (13, 1592080), (14, 1478360), (16, 1293565), (20, 1034852), (26, 796040), (28, 739180), (35, 591344), (40, 517426), (52, 398020), (56, 369590), (65, 318416), (70, 295672), (80, 258713), (91, 227440), (104, 199010), (112, 184795), (130, 159208), (140, 147836), (182, 113720), (208, 99505), (260, 79604), (280, 73918), (364, 56860), (455, 45488), (520, 39802), (560, 36959), (728, 28430), (910, 22744), (1040, 19901), (1456, 14215), (1820, 11372), (2843, 7280), (3640, 5686)]