28657640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:255

約数の個数: 96

約数和(自身を含む): 73543680

約数和(自身を除く): 44886040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 121, 124, 155, 191, 220, 242, 248, 310, 341, 382, 440, 484, 605, 620, 682, 764, 955, 968, 1210, 1240, 1364, 1528, 1705, 1910, 2101, 2420, 2728, 3410, 3751, 3820, 4202, 4840, 5921, 6820, 7502, 7640, 8404, 10505, 11842, 13640, 15004, 16808, 18755, 21010, 23111, 23684, 29605, 30008, 37510, 42020, 46222, 47368, 59210, 65131, 75020, 84040, 92444, 115555, 118420, 130262, 150040, 184888, 231110, 236840, 260524, 325655, 462220, 521048, 651310, 716441, 924440, 1302620, 1432882, 2605240, 2865764, 3582205, 5731528, 7164410, 14328820, 28657640]

約数ペア:

[(1, 28657640), (2, 14328820), (4, 7164410), (5, 5731528), (8, 3582205), (10, 2865764), (11, 2605240), (20, 1432882), (22, 1302620), (31, 924440), (40, 716441), (44, 651310), (55, 521048), (62, 462220), (88, 325655), (110, 260524), (121, 236840), (124, 231110), (155, 184888), (191, 150040), (220, 130262), (242, 118420), (248, 115555), (310, 92444), (341, 84040), (382, 75020), (440, 65131), (484, 59210), (605, 47368), (620, 46222), (682, 42020), (764, 37510), (955, 30008), (968, 29605), (1210, 23684), (1240, 23111), (1364, 21010), (1528, 18755), (1705, 16808), (1910, 15004), (2101, 13640), (2420, 11842), (2728, 10505), (3410, 8404), (3751, 7640), (3820, 7502), (4202, 6820), (4840, 5921)]