21021195

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 39029760

約数和(自身を除く): 18008565

約数列:

[1, 3, 5, 13, 15, 23, 39, 43, 65, 69, 109, 115, 129, 195, 215, 299, 327, 345, 545, 559, 645, 897, 989, 1417, 1495, 1635, 1677, 2507, 2795, 2967, 4251, 4485, 4687, 4945, 7085, 7521, 8385, 12535, 12857, 14061, 14835, 21255, 23435, 32591, 37605, 38571, 60931, 64285, 70305, 97773, 107801, 162955, 182793, 192855, 304655, 323403, 488865, 539005, 913965, 1401413, 1617015, 4204239, 7007065, 21021195]

約数ペア:

[(1, 21021195), (3, 7007065), (5, 4204239), (13, 1617015), (15, 1401413), (23, 913965), (39, 539005), (43, 488865), (65, 323403), (69, 304655), (109, 192855), (115, 182793), (129, 162955), (195, 107801), (215, 97773), (299, 70305), (327, 64285), (345, 60931), (545, 38571), (559, 37605), (645, 32591), (897, 23435), (989, 21255), (1417, 14835), (1495, 14061), (1635, 12857), (1677, 12535), (2507, 8385), (2795, 7521), (2967, 7085), (4251, 4945), (4485, 4687)]