20901790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{223}}^1$

素因数の和:353

約数の個数: 64

約数和(自身を含む): 46964736

約数和(自身を除く): 26062946

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 103, 130, 182, 206, 223, 446, 455, 515, 721, 910, 1030, 1115, 1339, 1442, 1561, 2230, 2678, 2899, 3122, 3605, 5798, 6695, 7210, 7805, 9373, 13390, 14495, 15610, 18746, 20293, 22969, 28990, 40586, 45938, 46865, 93730, 101465, 114845, 160783, 202930, 229690, 298597, 321566, 597194, 803915, 1492985, 1607830, 2090179, 2985970, 4180358, 10450895, 20901790]

約数ペア:

[(1, 20901790), (2, 10450895), (5, 4180358), (7, 2985970), (10, 2090179), (13, 1607830), (14, 1492985), (26, 803915), (35, 597194), (65, 321566), (70, 298597), (91, 229690), (103, 202930), (130, 160783), (182, 114845), (206, 101465), (223, 93730), (446, 46865), (455, 45938), (515, 40586), (721, 28990), (910, 22969), (1030, 20293), (1115, 18746), (1339, 15610), (1442, 14495), (1561, 13390), (2230, 9373), (2678, 7805), (2899, 7210), (3122, 6695), (3605, 5798)]