278301220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{89}}^1\times {\mathrm{541}}^1$

素因数の和:673

約数の個数: 72

約数和(自身を含む): 628969320

約数和(自身を除く): 350668100

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 289, 340, 356, 445, 541, 578, 890, 1082, 1156, 1445, 1513, 1780, 2164, 2705, 2890, 3026, 5410, 5780, 6052, 7565, 9197, 10820, 15130, 18394, 25721, 30260, 36788, 45985, 48149, 51442, 91970, 96298, 102884, 128605, 156349, 183940, 192596, 240745, 257210, 312698, 481490, 514420, 625396, 781745, 818533, 962980, 1563490, 1637066, 3126980, 3274132, 4092665, 8185330, 13915061, 16370660, 27830122, 55660244, 69575305, 139150610, 278301220]

約数ペア:

[(1, 278301220), (2, 139150610), (4, 69575305), (5, 55660244), (10, 27830122), (17, 16370660), (20, 13915061), (34, 8185330), (68, 4092665), (85, 3274132), (89, 3126980), (170, 1637066), (178, 1563490), (289, 962980), (340, 818533), (356, 781745), (445, 625396), (541, 514420), (578, 481490), (890, 312698), (1082, 257210), (1156, 240745), (1445, 192596), (1513, 183940), (1780, 156349), (2164, 128605), (2705, 102884), (2890, 96298), (3026, 91970), (5410, 51442), (5780, 48149), (6052, 45985), (7565, 36788), (9197, 30260), (10820, 25721), (15130, 18394)]