21421816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 46922400

約数和(自身を除く): 25500584

約数列:

[1, 2, 4, 8, 13, 19, 26, 37, 38, 52, 74, 76, 104, 148, 152, 247, 293, 296, 481, 494, 586, 703, 962, 988, 1172, 1406, 1924, 1976, 2344, 2812, 3809, 3848, 5567, 5624, 7618, 9139, 10841, 11134, 15236, 18278, 21682, 22268, 30472, 36556, 43364, 44536, 72371, 73112, 86728, 140933, 144742, 205979, 281866, 289484, 411958, 563732, 578968, 823916, 1127464, 1647832, 2677727, 5355454, 10710908, 21421816]

約数ペア:

[(1, 21421816), (2, 10710908), (4, 5355454), (8, 2677727), (13, 1647832), (19, 1127464), (26, 823916), (37, 578968), (38, 563732), (52, 411958), (74, 289484), (76, 281866), (104, 205979), (148, 144742), (152, 140933), (247, 86728), (293, 73112), (296, 72371), (481, 44536), (494, 43364), (586, 36556), (703, 30472), (962, 22268), (988, 21682), (1172, 18278), (1406, 15236), (1924, 11134), (1976, 10841), (2344, 9139), (2812, 7618), (3809, 5624), (3848, 5567)]