30721840

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 74807712

約数和(自身を除く): 44085872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 97, 107, 148, 185, 194, 214, 296, 370, 388, 428, 485, 535, 592, 740, 776, 856, 970, 1070, 1480, 1552, 1712, 1940, 2140, 2960, 3589, 3880, 3959, 4280, 7178, 7760, 7918, 8560, 10379, 14356, 15836, 17945, 19795, 20758, 28712, 31672, 35890, 39590, 41516, 51895, 57424, 63344, 71780, 79180, 83032, 103790, 143560, 158360, 166064, 207580, 287120, 316720, 384023, 415160, 768046, 830320, 1536092, 1920115, 3072184, 3840230, 6144368, 7680460, 15360920, 30721840]

約数ペア:

[(1, 30721840), (2, 15360920), (4, 7680460), (5, 6144368), (8, 3840230), (10, 3072184), (16, 1920115), (20, 1536092), (37, 830320), (40, 768046), (74, 415160), (80, 384023), (97, 316720), (107, 287120), (148, 207580), (185, 166064), (194, 158360), (214, 143560), (296, 103790), (370, 83032), (388, 79180), (428, 71780), (485, 63344), (535, 57424), (592, 51895), (740, 41516), (776, 39590), (856, 35890), (970, 31672), (1070, 28712), (1480, 20758), (1552, 19795), (1712, 17945), (1940, 15836), (2140, 14356), (2960, 10379), (3589, 8560), (3880, 7918), (3959, 7760), (4280, 7178)]