19921980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25541}}^1$

素因数の和:25566

約数の個数: 48

約数和(自身を含む): 60074784

約数和(自身を除く): 40152804

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25541, 51082, 76623, 102164, 127705, 153246, 255410, 306492, 332033, 383115, 510820, 664066, 766230, 996099, 1328132, 1532460, 1660165, 1992198, 3320330, 3984396, 4980495, 6640660, 9960990, 19921980]

約数ペア:

[(1, 19921980), (2, 9960990), (3, 6640660), (4, 4980495), (5, 3984396), (6, 3320330), (10, 1992198), (12, 1660165), (13, 1532460), (15, 1328132), (20, 996099), (26, 766230), (30, 664066), (39, 510820), (52, 383115), (60, 332033), (65, 306492), (78, 255410), (130, 153246), (156, 127705), (195, 102164), (260, 76623), (390, 51082), (780, 25541)]