279985900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:248

約数の個数: 144

約数和(自身を含む): 687456000

約数和(自身を除く): 407470100

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 25, 38, 43, 46, 50, 76, 86, 92, 95, 100, 115, 149, 172, 190, 215, 230, 298, 380, 430, 437, 460, 475, 575, 596, 745, 817, 860, 874, 950, 989, 1075, 1150, 1490, 1634, 1748, 1900, 1978, 2150, 2185, 2300, 2831, 2980, 3268, 3427, 3725, 3956, 4085, 4300, 4370, 4945, 5662, 6407, 6854, 7450, 8170, 8740, 9890, 10925, 11324, 12814, 13708, 14155, 14900, 16340, 17135, 18791, 19780, 20425, 21850, 24725, 25628, 28310, 32035, 34270, 37582, 40850, 43700, 49450, 56620, 64070, 65113, 68540, 70775, 75164, 81700, 85675, 93955, 98900, 121733, 128140, 130226, 141550, 147361, 160175, 171350, 187910, 243466, 260452, 283100, 294722, 320350, 325565, 342700, 375820, 469775, 486932, 589444, 608665, 640700, 651130, 736805, 939550, 1217330, 1302260, 1473610, 1627825, 1879100, 2434660, 2799859, 2947220, 3043325, 3255650, 3684025, 5599718, 6086650, 6511300, 7368050, 11199436, 12173300, 13999295, 14736100, 27998590, 55997180, 69996475, 139992950, 279985900]

約数ペア:

[(1, 279985900), (2, 139992950), (4, 69996475), (5, 55997180), (10, 27998590), (19, 14736100), (20, 13999295), (23, 12173300), (25, 11199436), (38, 7368050), (43, 6511300), (46, 6086650), (50, 5599718), (76, 3684025), (86, 3255650), (92, 3043325), (95, 2947220), (100, 2799859), (115, 2434660), (149, 1879100), (172, 1627825), (190, 1473610), (215, 1302260), (230, 1217330), (298, 939550), (380, 736805), (430, 651130), (437, 640700), (460, 608665), (475, 589444), (575, 486932), (596, 469775), (745, 375820), (817, 342700), (860, 325565), (874, 320350), (950, 294722), (989, 283100), (1075, 260452), (1150, 243466), (1490, 187910), (1634, 171350), (1748, 160175), (1900, 147361), (1978, 141550), (2150, 130226), (2185, 128140), (2300, 121733), (2831, 98900), (2980, 93955), (3268, 85675), (3427, 81700), (3725, 75164), (3956, 70775), (4085, 68540), (4300, 65113), (4370, 64070), (4945, 56620), (5662, 49450), (6407, 43700), (6854, 40850), (7450, 37582), (8170, 34270), (8740, 32035), (9890, 28310), (10925, 25628), (11324, 24725), (12814, 21850), (13708, 20425), (14155, 19780), (14900, 18791), (16340, 17135)]