1640520320

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{457}}^1$

素因数の和:626

約数の個数: 128

約数和(自身を含む): 4036262400

約数和(自身を除く): 2395742080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 79, 80, 128, 142, 158, 160, 284, 316, 320, 355, 395, 457, 568, 632, 640, 710, 790, 914, 1136, 1264, 1420, 1580, 1828, 2272, 2285, 2528, 2840, 3160, 3656, 4544, 4570, 5056, 5609, 5680, 6320, 7312, 9088, 9140, 10112, 11218, 11360, 12640, 14624, 18280, 22436, 22720, 25280, 28045, 29248, 32447, 36103, 36560, 44872, 45440, 50560, 56090, 58496, 64894, 72206, 73120, 89744, 112180, 129788, 144412, 146240, 162235, 179488, 180515, 224360, 259576, 288824, 292480, 324470, 358976, 361030, 448720, 519152, 577648, 648940, 717952, 722060, 897440, 1038304, 1155296, 1297880, 1444120, 1794880, 2076608, 2310592, 2563313, 2595760, 2888240, 3589760, 4153216, 4621184, 5126626, 5191520, 5776480, 10253252, 10383040, 11552960, 12816565, 20506504, 20766080, 23105920, 25633130, 41013008, 51266260, 82026016, 102532520, 164052032, 205065040, 328104064, 410130080, 820260160, 1640520320]

約数ペア:

[(1, 1640520320), (2, 820260160), (4, 410130080), (5, 328104064), (8, 205065040), (10, 164052032), (16, 102532520), (20, 82026016), (32, 51266260), (40, 41013008), (64, 25633130), (71, 23105920), (79, 20766080), (80, 20506504), (128, 12816565), (142, 11552960), (158, 10383040), (160, 10253252), (284, 5776480), (316, 5191520), (320, 5126626), (355, 4621184), (395, 4153216), (457, 3589760), (568, 2888240), (632, 2595760), (640, 2563313), (710, 2310592), (790, 2076608), (914, 1794880), (1136, 1444120), (1264, 1297880), (1420, 1155296), (1580, 1038304), (1828, 897440), (2272, 722060), (2285, 717952), (2528, 648940), (2840, 577648), (3160, 519152), (3656, 448720), (4544, 361030), (4570, 358976), (5056, 324470), (5609, 292480), (5680, 288824), (6320, 259576), (7312, 224360), (9088, 180515), (9140, 179488), (10112, 162235), (11218, 146240), (11360, 144412), (12640, 129788), (14624, 112180), (18280, 89744), (22436, 73120), (22720, 72206), (25280, 64894), (28045, 58496), (29248, 56090), (32447, 50560), (36103, 45440), (36560, 44872)]