40720040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{409}}^1$

素因数の和:570

約数の個数: 64

約数和(自身を含む): 97416000

約数和(自身を除く): 56695960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 131, 152, 190, 262, 380, 409, 524, 655, 760, 818, 1048, 1310, 1636, 2045, 2489, 2620, 3272, 4090, 4978, 5240, 7771, 8180, 9956, 12445, 15542, 16360, 19912, 24890, 31084, 38855, 49780, 53579, 62168, 77710, 99560, 107158, 155420, 214316, 267895, 310840, 428632, 535790, 1018001, 1071580, 2036002, 2143160, 4072004, 5090005, 8144008, 10180010, 20360020, 40720040]

約数ペア:

[(1, 40720040), (2, 20360020), (4, 10180010), (5, 8144008), (8, 5090005), (10, 4072004), (19, 2143160), (20, 2036002), (38, 1071580), (40, 1018001), (76, 535790), (95, 428632), (131, 310840), (152, 267895), (190, 214316), (262, 155420), (380, 107158), (409, 99560), (524, 77710), (655, 62168), (760, 53579), (818, 49780), (1048, 38855), (1310, 31084), (1636, 24890), (2045, 19912), (2489, 16360), (2620, 15542), (3272, 12445), (4090, 9956), (4978, 8180), (5240, 7771)]