21335440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1229}}^1$

素因数の和:1280

約数の個数: 80

約数和(自身を含む): 58567680

約数和(自身を除く): 37232240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1229, 1240, 1736, 2170, 2458, 2480, 3472, 4340, 4916, 6145, 8603, 8680, 9832, 12290, 17206, 17360, 19664, 24580, 34412, 38099, 43015, 49160, 68824, 76198, 86030, 98320, 137648, 152396, 172060, 190495, 266693, 304792, 344120, 380990, 533386, 609584, 688240, 761980, 1066772, 1333465, 1523960, 2133544, 2666930, 3047920, 4267088, 5333860, 10667720, 21335440]

約数ペア:

[(1, 21335440), (2, 10667720), (4, 5333860), (5, 4267088), (7, 3047920), (8, 2666930), (10, 2133544), (14, 1523960), (16, 1333465), (20, 1066772), (28, 761980), (31, 688240), (35, 609584), (40, 533386), (56, 380990), (62, 344120), (70, 304792), (80, 266693), (112, 190495), (124, 172060), (140, 152396), (155, 137648), (217, 98320), (248, 86030), (280, 76198), (310, 68824), (434, 49160), (496, 43015), (560, 38099), (620, 34412), (868, 24580), (1085, 19664), (1229, 17360), (1240, 17206), (1736, 12290), (2170, 9832), (2458, 8680), (2480, 8603), (3472, 6145), (4340, 4916)]