21620804980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{85061}}^1$

素因数の和:85320

約数の個数: 48

約数和(自身を含む): 46300947840

約数和(自身を除く): 24680142860

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 179, 284, 355, 358, 710, 716, 895, 1420, 1790, 3580, 12709, 25418, 50836, 63545, 85061, 127090, 170122, 254180, 340244, 425305, 850610, 1701220, 6039331, 12078662, 15225919, 24157324, 30196655, 30451838, 60393310, 60903676, 76129595, 120786620, 152259190, 304518380, 1081040249, 2162080498, 4324160996, 5405201245, 10810402490, 21620804980]

約数ペア:

[(1, 21620804980), (2, 10810402490), (4, 5405201245), (5, 4324160996), (10, 2162080498), (20, 1081040249), (71, 304518380), (142, 152259190), (179, 120786620), (284, 76129595), (355, 60903676), (358, 60393310), (710, 30451838), (716, 30196655), (895, 24157324), (1420, 15225919), (1790, 12078662), (3580, 6039331), (12709, 1701220), (25418, 850610), (50836, 425305), (63545, 340244), (85061, 254180), (127090, 170122)]