20161257220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{67021}}^1$

素因数の和:67145

約数の個数: 72

約数和(自身を含む): 46361798280

約数和(自身を除く): 26200541060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 169, 178, 260, 338, 356, 445, 676, 845, 890, 1157, 1690, 1780, 2314, 3380, 4628, 5785, 11570, 15041, 23140, 30082, 60164, 67021, 75205, 134042, 150410, 268084, 300820, 335105, 670210, 871273, 1340420, 1742546, 3485092, 4356365, 5964869, 8712730, 11326549, 11929738, 17425460, 22653098, 23859476, 29824345, 45306196, 56632745, 59648690, 77543297, 113265490, 119297380, 155086594, 226530980, 310173188, 387716485, 775432970, 1008062861, 1550865940, 2016125722, 4032251444, 5040314305, 10080628610, 20161257220]

約数ペア:

[(1, 20161257220), (2, 10080628610), (4, 5040314305), (5, 4032251444), (10, 2016125722), (13, 1550865940), (20, 1008062861), (26, 775432970), (52, 387716485), (65, 310173188), (89, 226530980), (130, 155086594), (169, 119297380), (178, 113265490), (260, 77543297), (338, 59648690), (356, 56632745), (445, 45306196), (676, 29824345), (845, 23859476), (890, 22653098), (1157, 17425460), (1690, 11929738), (1780, 11326549), (2314, 8712730), (3380, 5964869), (4628, 4356365), (5785, 3485092), (11570, 1742546), (15041, 1340420), (23140, 871273), (30082, 670210), (60164, 335105), (67021, 300820), (75205, 268084), (134042, 150410)]