21486640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:135

約数の個数: 160

約数和(自身を含む): 63103104

約数和(自身を除く): 41616464

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 37, 40, 56, 61, 68, 70, 74, 80, 85, 112, 119, 122, 136, 140, 148, 170, 185, 238, 244, 259, 272, 280, 296, 305, 340, 370, 427, 476, 488, 518, 560, 592, 595, 610, 629, 680, 740, 854, 952, 976, 1036, 1037, 1190, 1220, 1258, 1295, 1360, 1480, 1708, 1904, 2072, 2074, 2135, 2257, 2380, 2440, 2516, 2590, 2960, 3145, 3416, 4144, 4148, 4270, 4403, 4514, 4760, 4880, 5032, 5180, 5185, 6290, 6832, 7259, 8296, 8540, 8806, 9028, 9520, 10064, 10360, 10370, 11285, 12580, 14518, 15799, 16592, 17080, 17612, 18056, 20720, 20740, 22015, 22570, 25160, 29036, 31598, 34160, 35224, 36112, 36295, 38369, 41480, 44030, 45140, 50320, 58072, 63196, 70448, 72590, 76738, 78995, 82960, 88060, 90280, 116144, 126392, 145180, 153476, 157990, 176120, 180560, 191845, 252784, 268583, 290360, 306952, 315980, 352240, 383690, 537166, 580720, 613904, 631960, 767380, 1074332, 1263920, 1342915, 1534760, 2148664, 2685830, 3069520, 4297328, 5371660, 10743320, 21486640]

約数ペア:

[(1, 21486640), (2, 10743320), (4, 5371660), (5, 4297328), (7, 3069520), (8, 2685830), (10, 2148664), (14, 1534760), (16, 1342915), (17, 1263920), (20, 1074332), (28, 767380), (34, 631960), (35, 613904), (37, 580720), (40, 537166), (56, 383690), (61, 352240), (68, 315980), (70, 306952), (74, 290360), (80, 268583), (85, 252784), (112, 191845), (119, 180560), (122, 176120), (136, 157990), (140, 153476), (148, 145180), (170, 126392), (185, 116144), (238, 90280), (244, 88060), (259, 82960), (272, 78995), (280, 76738), (296, 72590), (305, 70448), (340, 63196), (370, 58072), (427, 50320), (476, 45140), (488, 44030), (518, 41480), (560, 38369), (592, 36295), (595, 36112), (610, 35224), (629, 34160), (680, 31598), (740, 29036), (854, 25160), (952, 22570), (976, 22015), (1036, 20740), (1037, 20720), (1190, 18056), (1220, 17612), (1258, 17080), (1295, 16592), (1360, 15799), (1480, 14518), (1708, 12580), (1904, 11285), (2072, 10370), (2074, 10360), (2135, 10064), (2257, 9520), (2380, 9028), (2440, 8806), (2516, 8540), (2590, 8296), (2960, 7259), (3145, 6832), (3416, 6290), (4144, 5185), (4148, 5180), (4270, 5032), (4403, 4880), (4514, 4760)]