21980985

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:99

約数の個数: 64

約数和(自身を含む): 41126400

約数和(自身を除く): 19145415

約数列:

[1, 3, 5, 13, 15, 23, 29, 39, 65, 69, 87, 115, 145, 169, 195, 299, 345, 377, 435, 507, 667, 845, 897, 1131, 1495, 1885, 2001, 2197, 2535, 3335, 3887, 4485, 4901, 5655, 6591, 8671, 10005, 10985, 11661, 14703, 19435, 24505, 26013, 32955, 43355, 50531, 58305, 63713, 73515, 112723, 130065, 151593, 191139, 252655, 318565, 338169, 563615, 757965, 955695, 1465399, 1690845, 4396197, 7326995, 21980985]

約数ペア:

[(1, 21980985), (3, 7326995), (5, 4396197), (13, 1690845), (15, 1465399), (23, 955695), (29, 757965), (39, 563615), (65, 338169), (69, 318565), (87, 252655), (115, 191139), (145, 151593), (169, 130065), (195, 112723), (299, 73515), (345, 63713), (377, 58305), (435, 50531), (507, 43355), (667, 32955), (845, 26013), (897, 24505), (1131, 19435), (1495, 14703), (1885, 11661), (2001, 10985), (2197, 10005), (2535, 8671), (3335, 6591), (3887, 5655), (4485, 4901)]