128428240

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1\times {\mathrm{281}}^1$

素因数の和:520

約数の個数: 80

約数和(自身を含む): 311564880

約数和(自身を除く): 183136640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 197, 232, 281, 290, 394, 464, 562, 580, 788, 985, 1124, 1160, 1405, 1576, 1970, 2248, 2320, 2810, 3152, 3940, 4496, 5620, 5713, 7880, 8149, 11240, 11426, 15760, 16298, 22480, 22852, 28565, 32596, 40745, 45704, 55357, 57130, 65192, 81490, 91408, 110714, 114260, 130384, 162980, 221428, 228520, 276785, 325960, 442856, 457040, 553570, 651920, 885712, 1107140, 1605353, 2214280, 3210706, 4428560, 6421412, 8026765, 12842824, 16053530, 25685648, 32107060, 64214120, 128428240]

約数ペア:

[(1, 128428240), (2, 64214120), (4, 32107060), (5, 25685648), (8, 16053530), (10, 12842824), (16, 8026765), (20, 6421412), (29, 4428560), (40, 3210706), (58, 2214280), (80, 1605353), (116, 1107140), (145, 885712), (197, 651920), (232, 553570), (281, 457040), (290, 442856), (394, 325960), (464, 276785), (562, 228520), (580, 221428), (788, 162980), (985, 130384), (1124, 114260), (1160, 110714), (1405, 91408), (1576, 81490), (1970, 65192), (2248, 57130), (2320, 55357), (2810, 45704), (3152, 40745), (3940, 32596), (4496, 28565), (5620, 22852), (5713, 22480), (7880, 16298), (8149, 15760), (11240, 11426)]