20000890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{709}}^1$

素因数の和:767

約数の個数: 64

約数和(自身を含む): 45803520

約数和(自身を除く): 25802630

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 31, 35, 62, 65, 70, 91, 130, 155, 182, 217, 310, 403, 434, 455, 709, 806, 910, 1085, 1418, 2015, 2170, 2821, 3545, 4030, 4963, 5642, 7090, 9217, 9926, 14105, 18434, 21979, 24815, 28210, 43958, 46085, 49630, 64519, 92170, 109895, 129038, 153853, 219790, 285727, 307706, 322595, 571454, 645190, 769265, 1428635, 1538530, 2000089, 2857270, 4000178, 10000445, 20000890]

約数ペア:

[(1, 20000890), (2, 10000445), (5, 4000178), (7, 2857270), (10, 2000089), (13, 1538530), (14, 1428635), (26, 769265), (31, 645190), (35, 571454), (62, 322595), (65, 307706), (70, 285727), (91, 219790), (130, 153853), (155, 129038), (182, 109895), (217, 92170), (310, 64519), (403, 49630), (434, 46085), (455, 43958), (709, 28210), (806, 24815), (910, 21979), (1085, 18434), (1418, 14105), (2015, 9926), (2170, 9217), (2821, 7090), (3545, 5642), (4030, 4963)]