21437650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:140

約数の個数: 72

約数和(自身を含む): 44930160

約数和(自身を除く): 23492510

約数列:

[1, 2, 5, 10, 13, 25, 26, 43, 50, 59, 65, 86, 118, 130, 169, 215, 295, 325, 338, 430, 559, 590, 650, 767, 845, 1075, 1118, 1475, 1534, 1690, 2150, 2537, 2795, 2950, 3835, 4225, 5074, 5590, 7267, 7670, 8450, 9971, 12685, 13975, 14534, 19175, 19942, 25370, 27950, 32981, 36335, 38350, 49855, 63425, 65962, 72670, 99710, 126850, 164905, 181675, 249275, 329810, 363350, 428753, 498550, 824525, 857506, 1649050, 2143765, 4287530, 10718825, 21437650]

約数ペア:

[(1, 21437650), (2, 10718825), (5, 4287530), (10, 2143765), (13, 1649050), (25, 857506), (26, 824525), (43, 498550), (50, 428753), (59, 363350), (65, 329810), (86, 249275), (118, 181675), (130, 164905), (169, 126850), (215, 99710), (295, 72670), (325, 65962), (338, 63425), (430, 49855), (559, 38350), (590, 36335), (650, 32981), (767, 27950), (845, 25370), (1075, 19942), (1118, 19175), (1475, 14534), (1534, 13975), (1690, 12685), (2150, 9971), (2537, 8450), (2795, 7670), (2950, 7267), (3835, 5590), (4225, 5074)]