21751305

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1613}}^1$

素因数の和:1681

約数の個数: 32

約数和(自身を含む): 37186560

約数和(自身を除く): 15435255

約数列:

[1, 3, 5, 15, 29, 31, 87, 93, 145, 155, 435, 465, 899, 1613, 2697, 4495, 4839, 8065, 13485, 24195, 46777, 50003, 140331, 150009, 233885, 250015, 701655, 750045, 1450087, 4350261, 7250435, 21751305]

約数ペア:

[(1, 21751305), (3, 7250435), (5, 4350261), (15, 1450087), (29, 750045), (31, 701655), (87, 250015), (93, 233885), (145, 150009), (155, 140331), (435, 50003), (465, 46777), (899, 24195), (1613, 13485), (2697, 8065), (4495, 4839)]