81237420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{461}}^1$

素因数の和:576

約数の個数: 144

約数和(自身を含む): 272432160

約数和(自身を除く): 191194740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 89, 90, 99, 110, 132, 165, 178, 180, 198, 220, 267, 330, 356, 396, 445, 461, 495, 534, 660, 801, 890, 922, 979, 990, 1068, 1335, 1383, 1602, 1780, 1844, 1958, 1980, 2305, 2670, 2766, 2937, 3204, 3916, 4005, 4149, 4610, 4895, 5071, 5340, 5532, 5874, 6915, 8010, 8298, 8811, 9220, 9790, 10142, 11748, 13830, 14685, 15213, 16020, 16596, 17622, 19580, 20284, 20745, 25355, 27660, 29370, 30426, 35244, 41029, 41490, 44055, 45639, 50710, 58740, 60852, 76065, 82058, 82980, 88110, 91278, 101420, 123087, 152130, 164116, 176220, 182556, 205145, 228195, 246174, 304260, 369261, 410290, 451319, 456390, 492348, 615435, 738522, 820580, 902638, 912780, 1230870, 1353957, 1477044, 1805276, 1846305, 2256595, 2461740, 2707914, 3692610, 4061871, 4513190, 5415828, 6769785, 7385220, 8123742, 9026380, 13539570, 16247484, 20309355, 27079140, 40618710, 81237420]

約数ペア:

[(1, 81237420), (2, 40618710), (3, 27079140), (4, 20309355), (5, 16247484), (6, 13539570), (9, 9026380), (10, 8123742), (11, 7385220), (12, 6769785), (15, 5415828), (18, 4513190), (20, 4061871), (22, 3692610), (30, 2707914), (33, 2461740), (36, 2256595), (44, 1846305), (45, 1805276), (55, 1477044), (60, 1353957), (66, 1230870), (89, 912780), (90, 902638), (99, 820580), (110, 738522), (132, 615435), (165, 492348), (178, 456390), (180, 451319), (198, 410290), (220, 369261), (267, 304260), (330, 246174), (356, 228195), (396, 205145), (445, 182556), (461, 176220), (495, 164116), (534, 152130), (660, 123087), (801, 101420), (890, 91278), (922, 88110), (979, 82980), (990, 82058), (1068, 76065), (1335, 60852), (1383, 58740), (1602, 50710), (1780, 45639), (1844, 44055), (1958, 41490), (1980, 41029), (2305, 35244), (2670, 30426), (2766, 29370), (2937, 27660), (3204, 25355), (3916, 20745), (4005, 20284), (4149, 19580), (4610, 17622), (4895, 16596), (5071, 16020), (5340, 15213), (5532, 14685), (5874, 13830), (6915, 11748), (8010, 10142), (8298, 9790), (8811, 9220)]