21372260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11743}}^1$

素因数の和:11772

約数の個数: 48

約数和(自身を含む): 55243776

約数和(自身を除く): 33871516

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11743, 23486, 46972, 58715, 82201, 117430, 152659, 164402, 234860, 305318, 328804, 411005, 610636, 763295, 822010, 1068613, 1526590, 1644020, 2137226, 3053180, 4274452, 5343065, 10686130, 21372260]

約数ペア:

[(1, 21372260), (2, 10686130), (4, 5343065), (5, 4274452), (7, 3053180), (10, 2137226), (13, 1644020), (14, 1526590), (20, 1068613), (26, 822010), (28, 763295), (35, 610636), (52, 411005), (65, 328804), (70, 305318), (91, 234860), (130, 164402), (140, 152659), (182, 117430), (260, 82201), (364, 58715), (455, 46972), (910, 23486), (1820, 11743)]