21437860

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{2131}}^1$

素因数の和:2643

約数の個数: 24

約数和(自身を含む): 45130176

約数和(自身を除く): 23692316

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2131, 2515, 4262, 5030, 8524, 10060, 10655, 21310, 42620, 1071893, 2143786, 4287572, 5359465, 10718930, 21437860]

約数ペア:

[(1, 21437860), (2, 10718930), (4, 5359465), (5, 4287572), (10, 2143786), (20, 1071893), (503, 42620), (1006, 21310), (2012, 10655), (2131, 10060), (2515, 8524), (4262, 5030)]