20820176

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{503}}^1$

素因数の和:723

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22927024

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 199, 208, 398, 503, 796, 1006, 1592, 2012, 2587, 3184, 4024, 5174, 6539, 8048, 10348, 13078, 20696, 26156, 41392, 52312, 100097, 104624, 200194, 400388, 800776, 1301261, 1601552, 2602522, 5205044, 10410088, 20820176]

約数ペア:

[(1, 20820176), (2, 10410088), (4, 5205044), (8, 2602522), (13, 1601552), (16, 1301261), (26, 800776), (52, 400388), (104, 200194), (199, 104624), (208, 100097), (398, 52312), (503, 41392), (796, 26156), (1006, 20696), (1592, 13078), (2012, 10348), (2587, 8048), (3184, 6539), (4024, 5174)]