81457460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^2$

素因数の和:321

約数の個数: 72

約数和(自身を含む): 203288064

約数和(自身を除く): 121830604

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 137, 140, 155, 217, 274, 310, 434, 548, 620, 685, 868, 959, 1085, 1370, 1918, 2170, 2740, 3836, 4247, 4340, 4795, 8494, 9590, 16988, 18769, 19180, 21235, 29729, 37538, 42470, 59458, 75076, 84940, 93845, 118916, 131383, 148645, 187690, 262766, 297290, 375380, 525532, 581839, 594580, 656915, 1163678, 1313830, 2327356, 2627660, 2909195, 4072873, 5818390, 8145746, 11636780, 16291492, 20364365, 40728730, 81457460]

約数ペア:

[(1, 81457460), (2, 40728730), (4, 20364365), (5, 16291492), (7, 11636780), (10, 8145746), (14, 5818390), (20, 4072873), (28, 2909195), (31, 2627660), (35, 2327356), (62, 1313830), (70, 1163678), (124, 656915), (137, 594580), (140, 581839), (155, 525532), (217, 375380), (274, 297290), (310, 262766), (434, 187690), (548, 148645), (620, 131383), (685, 118916), (868, 93845), (959, 84940), (1085, 75076), (1370, 59458), (1918, 42470), (2170, 37538), (2740, 29729), (3836, 21235), (4247, 19180), (4340, 18769), (4795, 16988), (8494, 9590)]