200020000

素因数分解:

$2^5\times 5^4\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:240

約数の個数: 120

約数和(自身を含む): 502461036

約数和(自身を除く): 302441036

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 73, 80, 100, 125, 137, 146, 160, 200, 250, 274, 292, 365, 400, 500, 548, 584, 625, 685, 730, 800, 1000, 1096, 1168, 1250, 1370, 1460, 1825, 2000, 2192, 2336, 2500, 2740, 2920, 3425, 3650, 4000, 4384, 5000, 5480, 5840, 6850, 7300, 9125, 10000, 10001, 10960, 11680, 13700, 14600, 17125, 18250, 20000, 20002, 21920, 27400, 29200, 34250, 36500, 40004, 45625, 50005, 54800, 58400, 68500, 73000, 80008, 85625, 91250, 100010, 109600, 137000, 146000, 160016, 171250, 182500, 200020, 250025, 274000, 292000, 320032, 342500, 365000, 400040, 500050, 548000, 685000, 730000, 800080, 1000100, 1250125, 1370000, 1460000, 1600160, 2000200, 2500250, 2740000, 4000400, 5000500, 6250625, 8000800, 10001000, 12501250, 20002000, 25002500, 40004000, 50005000, 100010000, 200020000]

約数ペア:

[(1, 200020000), (2, 100010000), (4, 50005000), (5, 40004000), (8, 25002500), (10, 20002000), (16, 12501250), (20, 10001000), (25, 8000800), (32, 6250625), (40, 5000500), (50, 4000400), (73, 2740000), (80, 2500250), (100, 2000200), (125, 1600160), (137, 1460000), (146, 1370000), (160, 1250125), (200, 1000100), (250, 800080), (274, 730000), (292, 685000), (365, 548000), (400, 500050), (500, 400040), (548, 365000), (584, 342500), (625, 320032), (685, 292000), (730, 274000), (800, 250025), (1000, 200020), (1096, 182500), (1168, 171250), (1250, 160016), (1370, 146000), (1460, 137000), (1825, 109600), (2000, 100010), (2192, 91250), (2336, 85625), (2500, 80008), (2740, 73000), (2920, 68500), (3425, 58400), (3650, 54800), (4000, 50005), (4384, 45625), (5000, 40004), (5480, 36500), (5840, 34250), (6850, 29200), (7300, 27400), (9125, 21920), (10000, 20002), (10001, 20000), (10960, 18250), (11680, 17125), (13700, 14600)]