21051940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:341

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34831580

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 43, 52, 65, 70, 86, 91, 130, 140, 172, 182, 215, 260, 269, 301, 364, 430, 455, 538, 559, 602, 860, 910, 1076, 1118, 1204, 1345, 1505, 1820, 1883, 2236, 2690, 2795, 3010, 3497, 3766, 3913, 5380, 5590, 6020, 6994, 7532, 7826, 9415, 11180, 11567, 13988, 15652, 17485, 18830, 19565, 23134, 24479, 34970, 37660, 39130, 46268, 48958, 57835, 69940, 78260, 80969, 97916, 115670, 122395, 150371, 161938, 231340, 244790, 300742, 323876, 404845, 489580, 601484, 751855, 809690, 1052597, 1503710, 1619380, 2105194, 3007420, 4210388, 5262985, 10525970, 21051940]

約数ペア:

[(1, 21051940), (2, 10525970), (4, 5262985), (5, 4210388), (7, 3007420), (10, 2105194), (13, 1619380), (14, 1503710), (20, 1052597), (26, 809690), (28, 751855), (35, 601484), (43, 489580), (52, 404845), (65, 323876), (70, 300742), (86, 244790), (91, 231340), (130, 161938), (140, 150371), (172, 122395), (182, 115670), (215, 97916), (260, 80969), (269, 78260), (301, 69940), (364, 57835), (430, 48958), (455, 46268), (538, 39130), (559, 37660), (602, 34970), (860, 24479), (910, 23134), (1076, 19565), (1118, 18830), (1204, 17485), (1345, 15652), (1505, 13988), (1820, 11567), (1883, 11180), (2236, 9415), (2690, 7826), (2795, 7532), (3010, 6994), (3497, 6020), (3766, 5590), (3913, 5380)]