20010020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1\times {\mathrm{257}}^1$

素因数の和:512

約数の個数: 48

約数和(自身を含む): 44861040

約数和(自身を除く): 24851020

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 229, 257, 340, 458, 514, 916, 1028, 1145, 1285, 2290, 2570, 3893, 4369, 4580, 5140, 7786, 8738, 15572, 17476, 19465, 21845, 38930, 43690, 58853, 77860, 87380, 117706, 235412, 294265, 588530, 1000501, 1177060, 2001002, 4002004, 5002505, 10005010, 20010020]

約数ペア:

[(1, 20010020), (2, 10005010), (4, 5002505), (5, 4002004), (10, 2001002), (17, 1177060), (20, 1000501), (34, 588530), (68, 294265), (85, 235412), (170, 117706), (229, 87380), (257, 77860), (340, 58853), (458, 43690), (514, 38930), (916, 21845), (1028, 19465), (1145, 17476), (1285, 15572), (2290, 8738), (2570, 7786), (3893, 5140), (4369, 4580)]