20980554

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{587}}^1$

素因数の和:659

約数の個数: 64

約数和(自身を含む): 51480576

約数和(自身を除く): 30500022

約数列:

[1, 2, 3, 6, 7, 14, 21, 23, 37, 42, 46, 69, 74, 111, 138, 161, 222, 259, 322, 483, 518, 587, 777, 851, 966, 1174, 1554, 1702, 1761, 2553, 3522, 4109, 5106, 5957, 8218, 11914, 12327, 13501, 17871, 21719, 24654, 27002, 35742, 40503, 43438, 65157, 81006, 94507, 130314, 152033, 189014, 283521, 304066, 456099, 499537, 567042, 912198, 999074, 1498611, 2997222, 3496759, 6993518, 10490277, 20980554]

約数ペア:

[(1, 20980554), (2, 10490277), (3, 6993518), (6, 3496759), (7, 2997222), (14, 1498611), (21, 999074), (23, 912198), (37, 567042), (42, 499537), (46, 456099), (69, 304066), (74, 283521), (111, 189014), (138, 152033), (161, 130314), (222, 94507), (259, 81006), (322, 65157), (483, 43438), (518, 40503), (587, 35742), (777, 27002), (851, 24654), (966, 21719), (1174, 17871), (1554, 13501), (1702, 12327), (1761, 11914), (2553, 8218), (3522, 5957), (4109, 5106)]