19911970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1721}}^1$

素因数の和:1830

約数の個数: 32

約数和(自身を含む): 39054960

約数和(自身を除く): 19142990

約数列:

[1, 2, 5, 10, 13, 26, 65, 89, 130, 178, 445, 890, 1157, 1721, 2314, 3442, 5785, 8605, 11570, 17210, 22373, 44746, 111865, 153169, 223730, 306338, 765845, 1531690, 1991197, 3982394, 9955985, 19911970]

約数ペア:

[(1, 19911970), (2, 9955985), (5, 3982394), (10, 1991197), (13, 1531690), (26, 765845), (65, 306338), (89, 223730), (130, 153169), (178, 111865), (445, 44746), (890, 22373), (1157, 17210), (1721, 11570), (2314, 8605), (3442, 5785)]