20865558

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{463}}^1$

素因数の和:541

約数の個数: 64

約数和(自身を含む): 50780160

約数和(自身を除く): 29914602

約数列:

[1, 2, 3, 6, 7, 14, 21, 29, 37, 42, 58, 74, 87, 111, 174, 203, 222, 259, 406, 463, 518, 609, 777, 926, 1073, 1218, 1389, 1554, 2146, 2778, 3219, 3241, 6438, 6482, 7511, 9723, 13427, 15022, 17131, 19446, 22533, 26854, 34262, 40281, 45066, 51393, 80562, 93989, 102786, 119917, 187978, 239834, 281967, 359751, 496799, 563934, 719502, 993598, 1490397, 2980794, 3477593, 6955186, 10432779, 20865558]

約数ペア:

[(1, 20865558), (2, 10432779), (3, 6955186), (6, 3477593), (7, 2980794), (14, 1490397), (21, 993598), (29, 719502), (37, 563934), (42, 496799), (58, 359751), (74, 281967), (87, 239834), (111, 187978), (174, 119917), (203, 102786), (222, 93989), (259, 80562), (406, 51393), (463, 45066), (518, 40281), (609, 34262), (777, 26854), (926, 22533), (1073, 19446), (1218, 17131), (1389, 15022), (1554, 13427), (2146, 9723), (2778, 7511), (3219, 6482), (3241, 6438)]