19240780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1721}}^1$

素因数の和:1786

約数の個数: 48

約数和(自身を含む): 44551584

約数和(自身を除く): 25310804

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 172, 215, 260, 430, 559, 860, 1118, 1721, 2236, 2795, 3442, 5590, 6884, 8605, 11180, 17210, 22373, 34420, 44746, 74003, 89492, 111865, 148006, 223730, 296012, 370015, 447460, 740030, 962039, 1480060, 1924078, 3848156, 4810195, 9620390, 19240780]

約数ペア:

[(1, 19240780), (2, 9620390), (4, 4810195), (5, 3848156), (10, 1924078), (13, 1480060), (20, 962039), (26, 740030), (43, 447460), (52, 370015), (65, 296012), (86, 223730), (130, 148006), (172, 111865), (215, 89492), (260, 74003), (430, 44746), (559, 34420), (860, 22373), (1118, 17210), (1721, 11180), (2236, 8605), (2795, 6884), (3442, 5590)]