21256060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:227

約数の個数: 96

約数和(自身を含む): 54996480

約数和(自身を除く): 33740420

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 61, 70, 76, 95, 122, 131, 133, 140, 190, 244, 262, 266, 305, 380, 427, 524, 532, 610, 655, 665, 854, 917, 1159, 1220, 1310, 1330, 1708, 1834, 2135, 2318, 2489, 2620, 2660, 3668, 4270, 4585, 4636, 4978, 5795, 7991, 8113, 8540, 9170, 9956, 11590, 12445, 15982, 16226, 17423, 18340, 23180, 24890, 31964, 32452, 34846, 39955, 40565, 49780, 55937, 69692, 79910, 81130, 87115, 111874, 151829, 159820, 162260, 174230, 223748, 279685, 303658, 348460, 559370, 607316, 759145, 1062803, 1118740, 1518290, 2125606, 3036580, 4251212, 5314015, 10628030, 21256060]

約数ペア:

[(1, 21256060), (2, 10628030), (4, 5314015), (5, 4251212), (7, 3036580), (10, 2125606), (14, 1518290), (19, 1118740), (20, 1062803), (28, 759145), (35, 607316), (38, 559370), (61, 348460), (70, 303658), (76, 279685), (95, 223748), (122, 174230), (131, 162260), (133, 159820), (140, 151829), (190, 111874), (244, 87115), (262, 81130), (266, 79910), (305, 69692), (380, 55937), (427, 49780), (524, 40565), (532, 39955), (610, 34846), (655, 32452), (665, 31964), (854, 24890), (917, 23180), (1159, 18340), (1220, 17423), (1310, 16226), (1330, 15982), (1708, 12445), (1834, 11590), (2135, 9956), (2318, 9170), (2489, 8540), (2620, 8113), (2660, 7991), (3668, 5795), (4270, 4978), (4585, 4636)]