21639760

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3259}}^1$

素因数の和:3355

約数の個数: 40

約数和(自身を含む): 50934240

約数和(自身を除く): 29294480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3259, 3320, 6518, 6640, 13036, 16295, 26072, 32590, 52144, 65180, 130360, 260720, 270497, 540994, 1081988, 1352485, 2163976, 2704970, 4327952, 5409940, 10819880, 21639760]

約数ペア:

[(1, 21639760), (2, 10819880), (4, 5409940), (5, 4327952), (8, 2704970), (10, 2163976), (16, 1352485), (20, 1081988), (40, 540994), (80, 270497), (83, 260720), (166, 130360), (332, 65180), (415, 52144), (664, 32590), (830, 26072), (1328, 16295), (1660, 13036), (3259, 6640), (3320, 6518)]