19996340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10987}}^1$

素因数の和:11016

約数の個数: 48

約数和(自身を含む): 51687552

約数和(自身を除く): 31691212

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10987, 21974, 43948, 54935, 76909, 109870, 142831, 153818, 219740, 285662, 307636, 384545, 571324, 714155, 769090, 999817, 1428310, 1538180, 1999634, 2856620, 3999268, 4999085, 9998170, 19996340]

約数ペア:

[(1, 19996340), (2, 9998170), (4, 4999085), (5, 3999268), (7, 2856620), (10, 1999634), (13, 1538180), (14, 1428310), (20, 999817), (26, 769090), (28, 714155), (35, 571324), (52, 384545), (65, 307636), (70, 285662), (91, 219740), (130, 153818), (140, 142831), (182, 109870), (260, 76909), (364, 54935), (455, 43948), (910, 21974), (1820, 10987)]