21987916

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 42134400

約数和(自身を除く): 20146484

約数列:

[1, 2, 4, 29, 37, 47, 58, 74, 94, 109, 116, 148, 188, 218, 436, 1073, 1363, 1739, 2146, 2726, 3161, 3478, 4033, 4292, 5123, 5452, 6322, 6956, 8066, 10246, 12644, 16132, 20492, 50431, 100862, 116957, 148567, 189551, 201724, 233914, 297134, 379102, 467828, 594268, 758204, 5496979, 10993958, 21987916]

約数ペア:

[(1, 21987916), (2, 10993958), (4, 5496979), (29, 758204), (37, 594268), (47, 467828), (58, 379102), (74, 297134), (94, 233914), (109, 201724), (116, 189551), (148, 148567), (188, 116957), (218, 100862), (436, 50431), (1073, 20492), (1363, 16132), (1739, 12644), (2146, 10246), (2726, 8066), (3161, 6956), (3478, 6322), (4033, 5452), (4292, 5123)]