20867210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{997}}^1$

素因数の和:1047

約数の個数: 64

約数和(自身を含む): 48287232

約数和(自身を除く): 27420022

約数列:

[1, 2, 5, 7, 10, 13, 14, 23, 26, 35, 46, 65, 70, 91, 115, 130, 161, 182, 230, 299, 322, 455, 598, 805, 910, 997, 1495, 1610, 1994, 2093, 2990, 4186, 4985, 6979, 9970, 10465, 12961, 13958, 20930, 22931, 25922, 34895, 45862, 64805, 69790, 90727, 114655, 129610, 160517, 181454, 229310, 298103, 321034, 453635, 596206, 802585, 907270, 1490515, 1605170, 2086721, 2981030, 4173442, 10433605, 20867210]

約数ペア:

[(1, 20867210), (2, 10433605), (5, 4173442), (7, 2981030), (10, 2086721), (13, 1605170), (14, 1490515), (23, 907270), (26, 802585), (35, 596206), (46, 453635), (65, 321034), (70, 298103), (91, 229310), (115, 181454), (130, 160517), (161, 129610), (182, 114655), (230, 90727), (299, 69790), (322, 64805), (455, 45862), (598, 34895), (805, 25922), (910, 22931), (997, 20930), (1495, 13958), (1610, 12961), (1994, 10465), (2093, 9970), (2990, 6979), (4186, 4985)]