21219380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:249

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34664140

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 89, 91, 130, 131, 140, 178, 182, 260, 262, 356, 364, 445, 455, 524, 623, 655, 890, 910, 917, 1157, 1246, 1310, 1703, 1780, 1820, 1834, 2314, 2492, 2620, 3115, 3406, 3668, 4585, 4628, 5785, 6230, 6812, 8099, 8515, 9170, 11570, 11659, 11921, 12460, 16198, 17030, 18340, 23140, 23318, 23842, 32396, 34060, 40495, 46636, 47684, 58295, 59605, 80990, 81613, 116590, 119210, 151567, 161980, 163226, 233180, 238420, 303134, 326452, 408065, 606268, 757835, 816130, 1060969, 1515670, 1632260, 2121938, 3031340, 4243876, 5304845, 10609690, 21219380]

約数ペア:

[(1, 21219380), (2, 10609690), (4, 5304845), (5, 4243876), (7, 3031340), (10, 2121938), (13, 1632260), (14, 1515670), (20, 1060969), (26, 816130), (28, 757835), (35, 606268), (52, 408065), (65, 326452), (70, 303134), (89, 238420), (91, 233180), (130, 163226), (131, 161980), (140, 151567), (178, 119210), (182, 116590), (260, 81613), (262, 80990), (356, 59605), (364, 58295), (445, 47684), (455, 46636), (524, 40495), (623, 34060), (655, 32396), (890, 23842), (910, 23318), (917, 23140), (1157, 18340), (1246, 17030), (1310, 16198), (1703, 12460), (1780, 11921), (1820, 11659), (1834, 11570), (2314, 9170), (2492, 8515), (2620, 8099), (3115, 6812), (3406, 6230), (3668, 5785), (4585, 4628)]