20398868

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:444

約数の個数: 48

約数和(自身を含む): 42835968

約数和(自身を除く): 22437100

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 71, 124, 142, 217, 284, 331, 434, 497, 662, 868, 994, 1324, 1988, 2201, 2317, 4402, 4634, 8804, 9268, 10261, 15407, 20522, 23501, 30814, 41044, 47002, 61628, 71827, 94004, 143654, 164507, 287308, 329014, 658028, 728531, 1457062, 2914124, 5099717, 10199434, 20398868]

約数ペア:

[(1, 20398868), (2, 10199434), (4, 5099717), (7, 2914124), (14, 1457062), (28, 728531), (31, 658028), (62, 329014), (71, 287308), (124, 164507), (142, 143654), (217, 94004), (284, 71827), (331, 61628), (434, 47002), (497, 41044), (662, 30814), (868, 23501), (994, 20522), (1324, 15407), (1988, 10261), (2201, 9268), (2317, 8804), (4402, 4634)]