2000408920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1\times {\mathrm{431}}^1$

素因数の和:689

約数の個数: 128

約数和(自身を含む): 4926873600

約数和(自身を除く): 2926464680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 124, 152, 155, 190, 197, 248, 310, 380, 394, 431, 589, 620, 760, 788, 862, 985, 1178, 1240, 1576, 1724, 1970, 2155, 2356, 2945, 3448, 3743, 3940, 4310, 4712, 5890, 6107, 7486, 7880, 8189, 8620, 11780, 12214, 13361, 14972, 16378, 17240, 18715, 23560, 24428, 26722, 29944, 30535, 32756, 37430, 40945, 48856, 53444, 61070, 65512, 66805, 74860, 81890, 84907, 106888, 116033, 122140, 133610, 149720, 163780, 169814, 232066, 244280, 253859, 267220, 327560, 339628, 424535, 464132, 507718, 534440, 580165, 679256, 849070, 928264, 1015436, 1160330, 1269295, 1613233, 1698140, 2030872, 2320660, 2538590, 2632117, 3226466, 3396280, 4641320, 5077180, 5264234, 6452932, 8066165, 10154360, 10528468, 12905864, 13160585, 16132330, 21056936, 26321170, 32264660, 50010223, 52642340, 64529320, 100020446, 105284680, 200040892, 250051115, 400081784, 500102230, 1000204460, 2000408920]

約数ペア:

[(1, 2000408920), (2, 1000204460), (4, 500102230), (5, 400081784), (8, 250051115), (10, 200040892), (19, 105284680), (20, 100020446), (31, 64529320), (38, 52642340), (40, 50010223), (62, 32264660), (76, 26321170), (95, 21056936), (124, 16132330), (152, 13160585), (155, 12905864), (190, 10528468), (197, 10154360), (248, 8066165), (310, 6452932), (380, 5264234), (394, 5077180), (431, 4641320), (589, 3396280), (620, 3226466), (760, 2632117), (788, 2538590), (862, 2320660), (985, 2030872), (1178, 1698140), (1240, 1613233), (1576, 1269295), (1724, 1160330), (1970, 1015436), (2155, 928264), (2356, 849070), (2945, 679256), (3448, 580165), (3743, 534440), (3940, 507718), (4310, 464132), (4712, 424535), (5890, 339628), (6107, 327560), (7486, 267220), (7880, 253859), (8189, 244280), (8620, 232066), (11780, 169814), (12214, 163780), (13361, 149720), (14972, 133610), (16378, 122140), (17240, 116033), (18715, 106888), (23560, 84907), (24428, 81890), (26722, 74860), (29944, 66805), (30535, 65512), (32756, 61070), (37430, 53444), (40945, 48856)]