20839480

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 48898080

約数和(自身を除く): 28058600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 131, 164, 194, 205, 262, 328, 388, 410, 485, 524, 655, 776, 820, 970, 1048, 1310, 1640, 1940, 2620, 3880, 3977, 5240, 5371, 7954, 10742, 12707, 15908, 19885, 21484, 25414, 26855, 31816, 39770, 42968, 50828, 53710, 63535, 79540, 101656, 107420, 127070, 159080, 214840, 254140, 508280, 520987, 1041974, 2083948, 2604935, 4167896, 5209870, 10419740, 20839480]

約数ペア:

[(1, 20839480), (2, 10419740), (4, 5209870), (5, 4167896), (8, 2604935), (10, 2083948), (20, 1041974), (40, 520987), (41, 508280), (82, 254140), (97, 214840), (131, 159080), (164, 127070), (194, 107420), (205, 101656), (262, 79540), (328, 63535), (388, 53710), (410, 50828), (485, 42968), (524, 39770), (655, 31816), (776, 26855), (820, 25414), (970, 21484), (1048, 19885), (1310, 15908), (1640, 12707), (1940, 10742), (2620, 7954), (3880, 5371), (3977, 5240)]