21840770

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{29}}^2\times {\mathrm{53}}^1$

素因数の和:132

約数の個数: 72

約数和(自身を含む): 48256884

約数和(自身を除く): 26416114

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 49, 53, 58, 70, 98, 106, 145, 203, 245, 265, 290, 371, 406, 490, 530, 742, 841, 1015, 1421, 1537, 1682, 1855, 2030, 2597, 2842, 3074, 3710, 4205, 5194, 5887, 7105, 7685, 8410, 10759, 11774, 12985, 14210, 15370, 21518, 25970, 29435, 41209, 44573, 53795, 58870, 75313, 82418, 89146, 107590, 150626, 206045, 222865, 312011, 376565, 412090, 445730, 624022, 753130, 1560055, 2184077, 3120110, 4368154, 10920385, 21840770]

約数ペア:

[(1, 21840770), (2, 10920385), (5, 4368154), (7, 3120110), (10, 2184077), (14, 1560055), (29, 753130), (35, 624022), (49, 445730), (53, 412090), (58, 376565), (70, 312011), (98, 222865), (106, 206045), (145, 150626), (203, 107590), (245, 89146), (265, 82418), (290, 75313), (371, 58870), (406, 53795), (490, 44573), (530, 41209), (742, 29435), (841, 25970), (1015, 21518), (1421, 15370), (1537, 14210), (1682, 12985), (1855, 11774), (2030, 10759), (2597, 8410), (2842, 7685), (3074, 7105), (3710, 5887), (4205, 5194)]