20721390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{509}}^1$

素因数の和:601

約数の個数: 64

約数和(自身を含む): 52876800

約数和(自身を除く): 32155410

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 59, 69, 115, 118, 138, 177, 230, 295, 345, 354, 509, 590, 690, 885, 1018, 1357, 1527, 1770, 2545, 2714, 3054, 4071, 5090, 6785, 7635, 8142, 11707, 13570, 15270, 20355, 23414, 30031, 35121, 40710, 58535, 60062, 70242, 90093, 117070, 150155, 175605, 180186, 300310, 351210, 450465, 690713, 900930, 1381426, 2072139, 3453565, 4144278, 6907130, 10360695, 20721390]

約数ペア:

[(1, 20721390), (2, 10360695), (3, 6907130), (5, 4144278), (6, 3453565), (10, 2072139), (15, 1381426), (23, 900930), (30, 690713), (46, 450465), (59, 351210), (69, 300310), (115, 180186), (118, 175605), (138, 150155), (177, 117070), (230, 90093), (295, 70242), (345, 60062), (354, 58535), (509, 40710), (590, 35121), (690, 30031), (885, 23414), (1018, 20355), (1357, 15270), (1527, 13570), (1770, 11707), (2545, 8142), (2714, 7635), (3054, 6785), (4071, 5090)]