18741980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:139

約数の個数: 96

約数和(自身を含む): 44943360

約数和(自身を除く): 26201380

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 37, 38, 43, 62, 74, 76, 86, 95, 124, 148, 155, 172, 185, 190, 215, 310, 370, 380, 430, 589, 620, 703, 740, 817, 860, 1147, 1178, 1333, 1406, 1591, 1634, 2294, 2356, 2666, 2812, 2945, 3182, 3268, 3515, 4085, 4588, 5332, 5735, 5890, 6364, 6665, 7030, 7955, 8170, 11470, 11780, 13330, 14060, 15910, 16340, 21793, 22940, 25327, 26660, 30229, 31820, 43586, 49321, 50654, 60458, 87172, 98642, 101308, 108965, 120916, 126635, 151145, 197284, 217930, 246605, 253270, 302290, 435860, 493210, 506540, 604580, 937099, 986420, 1874198, 3748396, 4685495, 9370990, 18741980]

約数ペア:

[(1, 18741980), (2, 9370990), (4, 4685495), (5, 3748396), (10, 1874198), (19, 986420), (20, 937099), (31, 604580), (37, 506540), (38, 493210), (43, 435860), (62, 302290), (74, 253270), (76, 246605), (86, 217930), (95, 197284), (124, 151145), (148, 126635), (155, 120916), (172, 108965), (185, 101308), (190, 98642), (215, 87172), (310, 60458), (370, 50654), (380, 49321), (430, 43586), (589, 31820), (620, 30229), (703, 26660), (740, 25327), (817, 22940), (860, 21793), (1147, 16340), (1178, 15910), (1333, 14060), (1406, 13330), (1591, 11780), (1634, 11470), (2294, 8170), (2356, 7955), (2666, 7030), (2812, 6665), (2945, 6364), (3182, 5890), (3268, 5735), (3515, 5332), (4085, 4588)]