20963840

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^1\times {\mathrm{431}}^1$

素因数の和:473

約数の個数: 80

約数和(自身を含む): 53032320

約数和(自身を除く): 32068480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 431, 512, 608, 640, 760, 862, 1216, 1280, 1520, 1724, 2155, 2432, 2560, 3040, 3448, 4310, 4864, 6080, 6896, 8189, 8620, 9728, 12160, 13792, 16378, 17240, 24320, 27584, 32756, 34480, 40945, 48640, 55168, 65512, 68960, 81890, 110336, 131024, 137920, 163780, 220672, 262048, 275840, 327560, 524096, 551680, 655120, 1048192, 1103360, 1310240, 2096384, 2620480, 4192768, 5240960, 10481920, 20963840]

約数ペア:

[(1, 20963840), (2, 10481920), (4, 5240960), (5, 4192768), (8, 2620480), (10, 2096384), (16, 1310240), (19, 1103360), (20, 1048192), (32, 655120), (38, 551680), (40, 524096), (64, 327560), (76, 275840), (80, 262048), (95, 220672), (128, 163780), (152, 137920), (160, 131024), (190, 110336), (256, 81890), (304, 68960), (320, 65512), (380, 55168), (431, 48640), (512, 40945), (608, 34480), (640, 32756), (760, 27584), (862, 24320), (1216, 17240), (1280, 16378), (1520, 13792), (1724, 12160), (2155, 9728), (2432, 8620), (2560, 8189), (3040, 6896), (3448, 6080), (4310, 4864)]