21087928

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{191}}^1\times {\mathrm{373}}^1$

素因数の和:607

約数の個数: 32

約数和(自身を含む): 40930560

約数和(自身を除く): 19842632

約数列:

[1, 2, 4, 8, 37, 74, 148, 191, 296, 373, 382, 746, 764, 1492, 1528, 2984, 7067, 13801, 14134, 27602, 28268, 55204, 56536, 71243, 110408, 142486, 284972, 569944, 2635991, 5271982, 10543964, 21087928]

約数ペア:

[(1, 21087928), (2, 10543964), (4, 5271982), (8, 2635991), (37, 569944), (74, 284972), (148, 142486), (191, 110408), (296, 71243), (373, 56536), (382, 55204), (746, 28268), (764, 27602), (1492, 14134), (1528, 13801), (2984, 7067)]