21231664

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{331}}^1$

素因数の和:569

約数の個数: 40

約数和(自身を含む): 43638080

約数和(自身を除く): 22406416

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 211, 304, 331, 422, 662, 844, 1324, 1688, 2648, 3376, 4009, 5296, 6289, 8018, 12578, 16036, 25156, 32072, 50312, 64144, 69841, 100624, 139682, 279364, 558728, 1117456, 1326979, 2653958, 5307916, 10615832, 21231664]

約数ペア:

[(1, 21231664), (2, 10615832), (4, 5307916), (8, 2653958), (16, 1326979), (19, 1117456), (38, 558728), (76, 279364), (152, 139682), (211, 100624), (304, 69841), (331, 64144), (422, 50312), (662, 32072), (844, 25156), (1324, 16036), (1688, 12578), (2648, 8018), (3376, 6289), (4009, 5296)]