21563988

素因数分解:

$2^2\times 3^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 51871680

約数和(自身を除く): 30307692

約数列:

[1, 2, 3, 4, 6, 12, 61, 89, 122, 178, 183, 244, 267, 331, 356, 366, 534, 662, 732, 993, 1068, 1324, 1986, 3972, 5429, 10858, 16287, 20191, 21716, 29459, 32574, 40382, 58918, 60573, 65148, 80764, 88377, 117836, 121146, 176754, 242292, 353508, 1796999, 3593998, 5390997, 7187996, 10781994, 21563988]

約数ペア:

[(1, 21563988), (2, 10781994), (3, 7187996), (4, 5390997), (6, 3593998), (12, 1796999), (61, 353508), (89, 242292), (122, 176754), (178, 121146), (183, 117836), (244, 88377), (267, 80764), (331, 65148), (356, 60573), (366, 58918), (534, 40382), (662, 32574), (732, 29459), (993, 21716), (1068, 20191), (1324, 16287), (1986, 10858), (3972, 5429)]