20043205

素因数分解:

$5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:99

約数の個数: 64

約数和(自身を含む): 32256000

約数和(自身を除く): 12212795

約数列:

[1, 5, 7, 13, 29, 31, 35, 49, 65, 91, 145, 155, 203, 217, 245, 343, 377, 403, 455, 637, 899, 1015, 1085, 1421, 1519, 1715, 1885, 2015, 2639, 2821, 3185, 4459, 4495, 6293, 7105, 7595, 9947, 10633, 11687, 13195, 14105, 18473, 19747, 22295, 31465, 44051, 49735, 53165, 58435, 81809, 92365, 98735, 129311, 138229, 220255, 308357, 409045, 572663, 646555, 691145, 1541785, 2863315, 4008641, 20043205]

約数ペア:

[(1, 20043205), (5, 4008641), (7, 2863315), (13, 1541785), (29, 691145), (31, 646555), (35, 572663), (49, 409045), (65, 308357), (91, 220255), (145, 138229), (155, 129311), (203, 98735), (217, 92365), (245, 81809), (343, 58435), (377, 53165), (403, 49735), (455, 44051), (637, 31465), (899, 22295), (1015, 19747), (1085, 18473), (1421, 14105), (1519, 13195), (1715, 11687), (1885, 10633), (2015, 9947), (2639, 7595), (2821, 7105), (3185, 6293), (4459, 4495)]