21461140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 72

約数和(自身を含む): 49512960

約数和(自身を除く): 28051820

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 68, 79, 85, 94, 158, 170, 188, 235, 289, 316, 340, 395, 470, 578, 790, 799, 940, 1156, 1343, 1445, 1580, 1598, 2686, 2890, 3196, 3713, 3995, 5372, 5780, 6715, 7426, 7990, 13430, 13583, 14852, 15980, 18565, 22831, 26860, 27166, 37130, 45662, 54332, 63121, 67915, 74260, 91324, 114155, 126242, 135830, 228310, 252484, 271660, 315605, 456620, 631210, 1073057, 1262420, 2146114, 4292228, 5365285, 10730570, 21461140]

約数ペア:

[(1, 21461140), (2, 10730570), (4, 5365285), (5, 4292228), (10, 2146114), (17, 1262420), (20, 1073057), (34, 631210), (47, 456620), (68, 315605), (79, 271660), (85, 252484), (94, 228310), (158, 135830), (170, 126242), (188, 114155), (235, 91324), (289, 74260), (316, 67915), (340, 63121), (395, 54332), (470, 45662), (578, 37130), (790, 27166), (799, 26860), (940, 22831), (1156, 18565), (1343, 15980), (1445, 14852), (1580, 13583), (1598, 13430), (2686, 7990), (2890, 7426), (3196, 6715), (3713, 5780), (3995, 5372)]