21287410

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{619}}^1$

素因数の和:826

約数の個数: 32

約数和(自身を含む): 40622400

約数和(自身を除く): 19334990

約数列:

[1, 2, 5, 10, 19, 38, 95, 181, 190, 362, 619, 905, 1238, 1810, 3095, 3439, 6190, 6878, 11761, 17195, 23522, 34390, 58805, 112039, 117610, 224078, 560195, 1120390, 2128741, 4257482, 10643705, 21287410]

約数ペア:

[(1, 21287410), (2, 10643705), (5, 4257482), (10, 2128741), (19, 1120390), (38, 560195), (95, 224078), (181, 117610), (190, 112039), (362, 58805), (619, 34390), (905, 23522), (1238, 17195), (1810, 11761), (3095, 6878), (3439, 6190)]